Powered by Deep Web Technologies
Note: This page contains sample records for the topic "furnaces heat air" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

Field Measurements of Heating Efficiency of Electric Forced-Air Furnaces in Six Manufactured Homes.  

Science Conference Proceedings (OSTI)

This report presents the results of field measurements of heating efficiency for six manufactured homes in the Pacific Northwest heated with electric forced-air systems. This is the first in a series of regional and national efforts to measure in detail the heating efficiency of manufactured homes. Only six homes were included in this study because of budgetary constraints; therefore this is not a representative sample. These investigations do provide some useful information on the heating efficiency of these homes. Useful comparisons can be drawn between these study homes and site-built heating efficiencies measured with a similar protocol. The protocol used to test these homes is very similar to another Ecotope protocol used in the study conducted in 1992 and 1993 for the Bonneville Power Administration to test the heating efficiency of 24 homes. This protocol combined real-time power measurements of furnace energy usage with energy usage during co-heat periods. Accessory data such as house and duct tightness measurements and tracer gas measurements were used to describe these homes and their heating system efficiency. Ensuring that manufactured housing is constructed in an energy and resource efficient manner is of increasing concern to manufactured home builders and consumers. No comparable work has been done to measure the heating system efficiency of MCS manufactured homes, although some co-heat tests have been performed on manufactured homes heated with natural gas to validate HUD thermal standards. It is expected that later in 1994 more research of this kind will be conducted, and perhaps a less costly and less time-consuming method for testing efficiencies will be develops.

Davis, Bob; Palmiter, Larry S.; Siegel, Jeff

1994-07-26T23:59:59.000Z

2

Forced air fireplace furnace  

Science Conference Proceedings (OSTI)

The design of heating system for buildings including a fireplace with an open front hearth for burning firewood, a chimney extending from the upper portion of the hearth, a metal firebox being open in the front and closed on the sides and back, a plenum chamber within and surrounding the sides and back of the metal firebox and the chimney lower portion, a horizontal heat distribution chamber positioned in the building attic and communicating at one end with the plenum chamber is described. An air distribution duct connects to the other end of the air distributing chamber, the duct extending to discharge heated air to a place in the building remote from the fireplace. A fan is placed in the horizontal air distributing chamber, and a return air duct extends from selected place in the building and communicates with the plenum chamber lower portion so that the fan draws air through the return air duct, through the plenum chamber around the firebox where the air is heated, through the horizontal distribution chamber, and out through the distribution duct for circulation of the heated air within the building.

Bruce, R.W.; Gorman, R.E.

1980-10-28T23:59:59.000Z

3

Reduce Air Infiltration in Furnaces  

Science Conference Proceedings (OSTI)

This DOE Industrial Technologies Program tip sheet describes how to save energy and costs by reducing air infiltration in industrial furnaces; tips include repairing leaks and increasing insulation.

Not Available

2006-01-01T23:59:59.000Z

4

Combustion Air Preheat on Steam Cracker Furnaces  

E-Print Network (OSTI)

Beginning in 1978, Exxon has started up nine large new steam cracking furnaces with various levels of air preheat, and has seven more under construction. Sources of heat have included process streams, flue gas and gas turbine exhaust. Several aspects of the technology employed have been patented in the U.S. and elsewhere. This paper discusses the use of process heat and gas turbine exhaust for air preheat to provide plant fuel savings of about 8% over and above a modern, fuel efficient alternative furnace without air preheat.

Kenney, W. F.

1983-01-01T23:59:59.000Z

5

Air Leakage of Furnaces and Air Handlers  

NLE Websites -- All DOE Office Websites (Extended Search)

Air Leakage of Furnaces and Air Handlers Air Leakage of Furnaces and Air Handlers Title Air Leakage of Furnaces and Air Handlers Publication Type Journal Article LBNL Report Number LBNL-5553E Year of Publication 2010 Authors Walker, Iain S., Mile Lubliner, Darryl J. Dickerhoff, and William W. Delp Journal 2010 ACEEE Summer Study on Energy Efficiency in Buildings The Climate for efficiency is now Date Published 08/2010 Abstract In recent years, great strides have been made in reducing air leakage in residential and to a lesser extent small commercial forced air duct systems. Several authorities have introduced low leakage limits for thermal distribution systems; for example, the State of California Energy Code for Buildings gives credit for systems that leak less than 6% of the total air flow at 25 Pa.

6

Reduce Air Infiltration in Furnaces (English/Chinese) (Fact Sheet)  

Science Conference Proceedings (OSTI)

Chinese translation of the Reduce Air Infiltration in Furnaces fact sheet. Provides suggestions on how to improve furnace energy efficiency. Fuel-fired furnaces discharge combustion products through a stack or a chimney. Hot furnace gases are less dense and more buoyant than ambient air, so they rise, creating a differential pressure between the top and the bottom of the furnace. This differential, known as thermal head, is the source of a natural draft or negative pressure in furnaces and boilers. A well-designed furnace (or boiler) is built to avoid air leakage into the furnace or leakage of flue gases from the furnace to the ambient. However, with time, most furnaces develop cracks or openings around doors, joints, and hearth seals. These openings (leaks) usually appear small compared with the overall dimensions of the furnace, so they are often ignored. The negative pressure created by the natural draft (or use of an induced-draft fan) in a furnace draws cold air through the openings (leaks) and into the furnace. The cold air becomes heated to the furnace exhaust gas temperature and then exits through the flue system, wasting valuable fuel. It might also cause excessive oxidation of metals or other materials in the furnaces. The heat loss due to cold air leakage resulting from the natural draft can be estimated if you know four major parameters: (1) The furnace or flue gas temperature; (2) The vertical distance H between the opening (leak) and the point where the exhaust gases leave the furnace and its flue system (if the leak is along a vertical surface, H will be an average value); (3) The area of the leak, in square inches; and (4) The amount of operating time the furnace spends at negative pressure. Secondary parameters that affect the amount of air leakage include these: (1) The furnace firing rate; (2) The flue gas velocity through the stack or the stack cross-section area; (3) The burner operating conditions (e.g., excess air, combustion air temperature, and so on). For furnaces or boilers using an induced-draft (ID) fan, the furnace negative pressure depends on the fan performance and frictional losses between the fan inlet and the point of air leakage. In most cases, it would be necessary to measure or estimate negative pressure at the opening. The amount of air leakage, the heat lost in flue gases, and their effects on increased furnace or boiler fuel consumption can be calculated by using the equations and graphs given in Industrial Furnaces (see W. Trinks et al., below). Note that the actual heat input required to compensate for the heat loss in flue gases due to air leakage would be greater than the heat contained in the air leakage because of the effect of available heat in the furnace. For a high-temperature furnace that is not maintained properly, the fuel consumption increase due to air leakage can be as high as 10% of the fuel input.

Not Available

2011-10-01T23:59:59.000Z

7

Heat pipes and use of heat pipes in furnace exhaust  

DOE Patents (OSTI)

An array of a plurality of heat pipe are mounted in spaced relationship to one another with the hot end of the heat pipes in a heated environment, e.g. the exhaust flue of a furnace, and the cold end outside the furnace. Heat conversion equipment is connected to the cold end of the heat pipes.

Polcyn, Adam D. (Pittsburgh, PA)

2010-12-28T23:59:59.000Z

8

Furnaces and Boilers  

Energy.gov (U.S. Department of Energy (DOE))

Furnaces heat air and distribute the heated air through a building using ducts; boilers heat water, providing either hot water or steam for heating.

9

Self-powered automatic secondary air controllers for woodstoves and small furnaces  

DOE Patents (OSTI)

This invention relates to the regulation of combustion in woodstoves, small furnaces and the like, so as to produce efficient combustion, while maximizing the possible heat output and minimizing air pollution. More specifically, the invention relates to controllers for automatically regulating and the supply of secondary combustion air to woodstoves, small furnaces or the like. 9 figs.

Siemer, D.D.

1989-03-15T23:59:59.000Z

10

Waste Heat Recovery – Submerged Arc Furnaces (SAF)  

E-Print Network (OSTI)

Submerged Arc Furnaces are used to produce high temperature alloys. These furnaces typically run at 3000°F using high voltage electricity along with metallurgical carbon to reduce metal oxides to pure elemental form. The process as currently designed consumes power and fuel that yields an energy efficiency of approximately 40% (Total Btu’s required to reduce to elemental form/ Btu Input). The vast majority of heat is lost to the atmosphere or cooling water system. The furnaces can be modified to recover this heat and convert it to power. The system will then reduce the amount of purchased power by approximately 25% without any additional use of fuel. The cost of this power is virtually unchanged over the life of the project because of the use of capital to displace fuel consumed from the purchased power source.

O'Brien, T.

2008-01-01T23:59:59.000Z

11

Plasma as a Blast Furnace Supplement: An Evaluation of Thermal Plasma Energy to Heat Blast Air for Iron Productiion, CMP Report No. 89-1  

Science Conference Proceedings (OSTI)

This study evaluates the use of thermal plasma heat for blast superheating in iron blast furnace operation. The basic research for this technology was carried out in the 1970's, primarily by the Centre des Recherches Metallurgiques (CRM) in Belgium. The main impetus for development was to increase productivity and efficiency and to decrease coke consumption. This was achieved by replacing some coke fuel by alternative injectant fuels (CH4, oil, coal, etc.) and compensating for these injectants by increas...

1990-10-31T23:59:59.000Z

12

HEATING, AIR-CONDITIONING AND REFRIGERATION DISTRIBUTORS INTERNATIONAL (HARDI)  

Energy.gov (U.S. Department of Energy (DOE))

OE Framework Document and Stakeholder Meeting regarding the Enforcement of the updated Energy Conservation Standards for Air Conditioners, Furnaces and Heat Pumps.

13

Furnace and Heat Recovery Area Design and Analysis for Conceptual Design of Oxygen-Based PC Boiler  

Science Conference Proceedings (OSTI)

The objective of the furnace and heat recovery area design and analysis task of the Conceptual Design of Oxygen-Based PC Boiler study is to optimize the location and design of the furnace, burners, over-fire gas ports, and internal radiant surfaces. The furnace and heat recovery area were designed and analyzed using the FW-FIRE and HEATEX computer programs. The furnace is designed with opposed wall-firing burners and over-fire air ports. Water is circulated in the furnace by natural circulation to the waterwalls and divisional wall panels. Compared to the air-fired furnace, the oxygen-fired furnace requires only 65% of the surface area and 45% of the volume. Two oxygen-fired designs were simulated: (1) without over-fire air and (2) with 20% over-fire air. The maximum wall heat flux in the oxygen-fired furnace is more than double that of the air-fired furnace due to the higher flame temperature and higher H{sub 2}O and CO{sub 2} concentrations. The coal burnout for the oxygen-fired case is 100% due to a 500 F higher furnace temperature and higher concentration of O{sub 2}. Because of the higher furnace wall temperature of the oxygen-fired case compared to the air-fired case, furnace water wall material was upgraded from carbon steel to T91. The total heat transfer surface required in the oxygen-fired heat recovery area (HRA) is 25% less than the air-fired HRA due to more heat being absorbed in the oxygen-fired furnace and the greater molecular weight of the oxygen-fired flue gas. The HRA tube materials and wall thickness are practically the same for the air-fired and oxygen-fired design since the flue gas and water/steam temperature profiles encountered by the heat transfer banks are very similar.

Andrew Seltzer

2005-01-01T23:59:59.000Z

14

Install Waste Heat Recovery Systems for Fuel-Fired Furnaces (English/Chinese) (Fact Sheet)  

SciTech Connect

Chinese translation of ITP fact sheet about installing Waste Heat Recovery Systems for Fuel-Fired Furnaces. For most fuel-fired heating equipment, a large amount of the heat supplied is wasted as exhaust or flue gases. In furnaces, air and fuel are mixed and burned to generate heat, some of which is transferred to the heating device and its load. When the heat transfer reaches its practical limit, the spent combustion gases are removed from the furnace via a flue or stack. At this point, these gases still hold considerable thermal energy. In many systems, this is the greatest single heat loss. The energy efficiency can often be increased by using waste heat gas recovery systems to capture and use some of the energy in the flue gas. For natural gas-based systems, the amount of heat contained in the flue gases as a percentage of the heat input in a heating system can be estimated by using Figure 1. Exhaust gas loss or waste heat depends on flue gas temperature and its mass flow, or in practical terms, excess air resulting from combustion air supply and air leakage into the furnace. The excess air can be estimated by measuring oxygen percentage in the flue gases.

Not Available

2011-10-01T23:59:59.000Z

15

The Impact of Forced Air System Blowers on Furnace Performance and Utility  

NLE Websites -- All DOE Office Websites (Extended Search)

The Impact of Forced Air System Blowers on Furnace Performance and Utility The Impact of Forced Air System Blowers on Furnace Performance and Utility Loads Speaker(s): Bert Phillips Date: November 7, 2003 - 12:00pm Location: Bldg. 90 Seminar Host/Point of Contact: James Lutz Bert Phillips will talk about the impact of forced air system blower performance on furnace or heating performance and on utility loads, and what can be done to reduce blower power requirements. He will also briefly discuss a ground source heat pump monitoring study that he just finished. Mr. Phillips is a registered Professional Engineer in three Canadian provinces and part owner of UNIES Ltd., an engineering firm in Winnipeg, Manitoba (60 miles straight north of the North Dakota/Minnesota border). He does research and HVAC system design and investigates

16

Energy Basics: Solar Air Heating  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Homes & Buildings Printable Version Share this resource Lighting & Daylighting Passive Solar Design Space Heating & Cooling Cooling Systems Heating Systems Furnaces & Boilers Wood...

17

Technical support document: Energy efficiency standards for consumer products: Room air conditioners, water heaters, direct heating equipment, mobile home furnaces, kitchen ranges and ovens, pool heaters, fluorescent lamp ballasts and television sets. Volume 1, Methodology  

SciTech Connect

The Energy Policy and Conservation Act (P.L. 94-163), as amended, establishes energy conservation standards for 12 of the 13 types of consumer products specifically covered by the Act. The legislation requires the Department of Energy (DOE) to consider new or amended standards for these and other types of products at specified times. DOE is currently considering amending standards for seven types of products: water heaters, direct heating equipment, mobile home furnaces, pool heaters, room air conditioners, kitchen ranges and ovens (including microwave ovens), and fluorescent light ballasts and is considering establishing standards for television sets. This Technical Support Document presents the methodology, data, and results from the analysis of the energy and economic impacts of the proposed standards. This volume presents a general description of the analytic approach, including the structure of the major models.

Not Available

1993-11-01T23:59:59.000Z

18

Furnace and Heat Recovery Area Design and Analysis for Conceptual Design of Supercritical O2-Based PC Boiler  

Science Conference Proceedings (OSTI)

The objective of the furnace and heat recovery area design and analysis task of the Conceptual Design of Supercritical Oxygen-Based PC Boiler study is to optimize the location and design of the furnace, burners, over-fire gas ports, and internal radiant surfaces. The furnace and heat recovery area were designed and analyzed using the FW-FIRE, Siemens, and HEATEX computer programs. The furnace is designed with opposed wall-firing burners and over-fire air ports. Water is circulated in the furnace by forced circulation to the waterwalls at the periphery and divisional wall panels within the furnace. Compared to the air-fired furnace, the oxygen-fired furnace requires only 65% of the surface area and 45% of the volume. Two oxygen-fired designs were simulated: (1) with cryogenic air separation unit (ASU) and (2) with oxygen ion transport membrane (OITM). The maximum wall heat flux in the oxygen-fired furnace is more than double that of the air-fired furnace due to the higher flame temperature and higher H{sub 2}O and CO{sub 2} concentrations. The coal burnout for the oxygen-fired case is 100% due to a 500 F higher furnace temperature and higher concentration of O{sub 2}. Because of the higher furnace wall temperature of the oxygen-fired case compared to the air-fired case, furnace water wall material was upgraded from T2 to T92. Compared to the air-fired heat recovery area (HRA), the oxygen-fired HRA total heat transfer surface is 35% less for the cryogenic design and 13% less for the OITM design due to more heat being absorbed in the oxygen-fired furnace and the greater molecular weight of the oxygen-fired flue gas. The HRA tube materials and wall thickness are nearly the same for the air-fired and oxygen-fired design since the flue gas and water/steam temperature profiles encountered by the heat transfer banks are similar.

Andrew Seltzer

2006-05-01T23:59:59.000Z

19

Energy Basics: Solar Air Heating  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

EERE: Energy Basics Solar Air Heating Solar air heating systems use air as the working fluid for absorbing and transferring solar energy. Solar air collectors (devices to heat air...

20

Estimation of Fuel Savings by Recuperation of Furnace Exhausts to Preheat Combustion Air  

E-Print Network (OSTI)

The recovery of waste energy in furnace exhaust gases is gaining in importance as fuel costs continue to escalate. Installation of a recuperator in the furnace exhaust stream to preheat the combustion air can result in considerable savings in fuel usage. These savings are primarily the result of the sensible heat increase of the combustion air and, to some extent, improved combustion efficiency. The amount of fuel saved will depend on the exhaust gas temperature, amount of excess air used, the type of burner and the furnace control system. These fuel savings may be accurately measured by metering the energy consumption per unit of production before and after installation of the recuperator. In the design of a waste heat recuperation system, it is necessary to be able to estimate the fuel saved by use of such a system. Standard industrial practice refers to the method described in the North American Combustion Handbook with its curves and tables that directly predict the percentage fuel savings. This paper analyzes the standard estimation technique and suggests a more realistic approach to calculation of percent fuel savings. Mass and enthalpy balances are provided for both methods and a typical furnace recuperation example is detailed to illustrate the differences in the two methods of calculating the percent energy saved.

Rebello, W. J.; Kohnken, K. H.; Phipps, H. R., Jr.

1980-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "furnaces heat air" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

The data furnace: heating up with cloud computing  

Science Conference Proceedings (OSTI)

In this paper, we argue that servers can be sent to homes and office buildings and used as a primary heat source. We call this approach the Data Furnace or DF. Data Furances have three advantages over traditional data centers: 1) a smaller carbon footprint ...

Jie Liu; Michel Goraczko; Sean James; Christian Belady; Jiakang Lu; Kamin Whitehouse

2011-06-01T23:59:59.000Z

22

Air pollutant emissions prediction by process modelling - Application in the iron and steel industry in the case of a re-heating furnace  

Science Conference Proceedings (OSTI)

Monitoring air pollutant emissions of large industrial installations is necessary to ensure compliance with environmental legislation. Most of the available measurement techniques are expensive, and measurement conditions such as high-temperature emissions, ... Keywords: Artificial neural networks, CO2, Correlation method, Fume emissions, Multiple linear regression, NO2, Steelworks process modelling

Anda Ionescu; Yves Candau

2007-09-01T23:59:59.000Z

23

Energy saving furnace controller  

Science Conference Proceedings (OSTI)

This patent describes a forced air heating system including a furnace controlled by a household thermostat. The furnace includes a burner, burning valve, heat exchanger, plenum and fan for circulating air through the heat exchanger and plenum. An auxiliary controller comprises: relay means connectable between the household thermostat and the furnace burner valve; and timing means for controlling the duty cycle of the furnace burner valve by opening and closing the relay. The timing means includes means for timing alternating first and second intervals, the first interval at least substantially equal to the length of time the furnace delays between a cell for heat from the household thermostat and the start of the furnace fan when the furnace is started from a cool state. The second interval corresponds to a percentage of the first interval.

Johnson, H.R.; Lombardi, S.E.

1987-05-26T23:59:59.000Z

24

Self-powered automatic secondary air controllers for woodstoves and small furnaces  

DOE Patents (OSTI)

A controller for automatically regulating the supply of secondary combustion air to woodstoves and small furnaces. The controller includes a movable air valve for controlling the amount of secondary air admitted into the chamber. A self powered means monitors the concentration of combustible gases and vapors and actuates the movable air valve to increase the supply of secondary air in response to increasing concentrations of the combustible gases and vapors. The self-powered means can be two fluid filled sensor bulbs, one of which has a coating of a combustion catalyst. Alternatively, the self powered means can be two metallic stripes laminated together, one of which is coated with a combustion catalyst, and when heated, causes the air valve to actuate.

Siemer, Darryl D. (Idaho Falls, ID)

1991-01-01T23:59:59.000Z

25

Air heating system  

DOE Patents (OSTI)

A self-starting, fuel-fired, air heating system including a vapor generator, a turbine, and a condenser connected in a closed circuit such that the vapor output from the vapor generator is conducted to the turbine and then to the condenser where it is condensed for return to the vapor generator. The turbine drives an air blower which passes air over the condenser for cooling the condenser. Also, a condensate pump is driven by the turbine. The disclosure is particularly concerned with the provision of heat exchanger and circuitry for cooling the condensed fluid output from the pump prior to its return to the vapor generator.

Primeau, John J. (19800 Seminole Rd., Euclid, OH 44117)

1983-03-01T23:59:59.000Z

26

Residential Two-Stage Gas Furnaces - Do They Save Energy?  

E-Print Network (OSTI)

Air-Handler Efficiency. ASHRAE Transactions, V. 110, Pt.1,Air Heating System Performance. ASHRAE Transactions, V. 104,Furnace Air Handlers Save? , ASHRAE Transactions, V. 110,

Lekov, Alex; Franco, Victor; Lutz, James

2006-01-01T23:59:59.000Z

27

Heating, Ventilation, and Air Conditioning Renovations | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Heating, Ventilation, and Air Conditioning Renovations Heating, Ventilation, and Air Conditioning Renovations Heating, Ventilation, and Air Conditioning Renovations October 16, 2013 - 4:49pm Addthis Renewable Energy Options for HVAC Renovations Geothermal Heat Pumps (GHP) Solar Water Heating (SWH) Biomass Passive Solar Heating Biomass Heating Solar Ventilation Air Preheating Federal building renovations that encompass the heating, ventilation, and air conditioning (HVAC) systems in a facility provide a range of renewable energy opportunities. The primary technology option for HVAC renovations is geothermal heat pumps (GHP). Other options include leveraging a solar water heating (SWH) system to offset heating load or using passive solar heating or a biomass-capable furnace or boiler. Some facilities may also take

28

Furnaces and Boilers | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Furnaces and Boilers Furnaces and Boilers Furnaces and Boilers June 24, 2012 - 4:56pm Addthis Upgrading to a high efficiency furnace or boiler is an effective way to save money on home heating. Upgrading to a high efficiency furnace or boiler is an effective way to save money on home heating. What does this mean for me? To maintain your heating system's efficiency and ensure healthy indoor air quality, it's critical to maintain the unit and its venting mechanism. Proper maintenance extends the life of your furnace or boiler and saves you money. Most U.S. homes are heated with either furnaces or boilers. Furnaces heat air and distribute the heated air through the house using ducts. Boilers heat water, and provide either hot water or steam for heating. Steam is distributed via pipes to steam radiators, and hot water can be distributed

29

Improved Heat Transfer and Performance of High Intensity Combustion Systems for Reformer Furnace Applications  

E-Print Network (OSTI)

Developments over the past fifteen years have evolved new short flame, high intensity (1,000,000 BTU/HR/ft3 ) combustion systems for industrial uses. Such systems produce a more uniform and higher heat flux than conventional low intensity systems and should enable substantial capital cost savings in new furnace applications. Recent performance improvements established from tests of high intensity combustion systems are described along with advances made in the analytical prediction of design performance. High intensity combustion systems can operate at zero excess air conditions without generating undesirable constituents in the exhaust. A more uniform gas temperature and gas emissivity renders modeling and design of the furnace radiant heat transfer section more realistic. 'Over-design' to allow for the less determinate conditions typical of low intensity, turbulent diffusion oil flame systems should be avoidable. A model has been set up and results generated which indicate the potentialities of the above premise. The application of vortex stabilized high intensity burners for reformer furnaces in the petrochemical industry is then reviewed and emphasized.

Williams, F. D. M.; Kondratas, H. M.

1983-01-01T23:59:59.000Z

30

Energy Basics: Air-Source Heat Pumps  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Systems Air-Source Heat Pumps Ductless Mini-Split Heat Pumps Absorption Heat Pumps Geothermal Heat Pumps Supporting Equipment for Heating & Cooling Systems Water Heating...

31

Furnace and Boiler Basics | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Furnace and Boiler Basics Furnace and Boiler Basics Furnace and Boiler Basics August 16, 2013 - 2:50pm Addthis Furnaces heat air and distribute the heated air through a building using ducts; boilers heat water, providing either hot water or steam for heating. Furnaces Furnaces are the most common heating systems used in homes in the United States. They can be all electric, gas-fired (including propane or natural gas), or oil-fired. Boilers Boilers consist of a vessel or tank where heat produced from the combustion of such fuels as natural gas, fuel oil, or coal is used to generate hot water or steam. Many buildings have their own boilers, while other buildings have steam or hot water piped in from a central plant. Commercial boilers are manufactured for high- or low-pressure applications.

32

Technical support document: Energy efficiency standards for consumer products: Room air conditioners, water heaters, direct heating equipment, mobile home furnaces, kitchen ranges and ovens, pool heaters, fluorescent lamp ballasts and television sets. Volume 3, Water heaters, pool heaters, direct heating equipment, and mobile home furnaces  

SciTech Connect

This is Volume 3 in a series of documents on energy efficiency of consumer products. This volume discusses energy efficiency of water heaters. Water heaters are defined by NAECA as products that utilize oil, gas, or electricity to heat potable water for use outside the heater upon demand. These are major appliances, which use a large portion (18% on average) of total energy consumed per household (1). They differ from most other appliances in that they are usually installed in obscure locations as part of the plumbing and are ignored until they fail. Residential water heaters are capable of heating water up to 180{degrees}F, although the setpoints are usually set lower.

Not Available

1993-11-01T23:59:59.000Z

33

Solar air heating system for combined DHW and space heating  

E-Print Network (OSTI)

Solar air heating system for combined DHW and space heating solar air collector PV-panel fannon-return valve DHW tank mantle cold waterhot water roof Solar Energy Centre Denmark Danish Technological Institute SEC-R-29 #12;Solar air heating system for combined DHW and space heating Søren �stergaard Jensen

34

Development and Practice of Blast Furnace Physical Heat Index ...  

Science Conference Proceedings (OSTI)

Application of Computational Thermodynamics in Solid Oxide Fuel Cell ... Heat Index Based on the Hot Metal Silicon Content and Temperature Prediction Model

35

Waste Heat Recovery and Furnace Technology - Programmaster.org  

Science Conference Proceedings (OSTI)

Mar 5, 2013 ... Each source of waste heat is listed together with the assessment for potential cogeneration or direct recovery. The overall impact on energy ...

36

Furnace Design and Operation  

Science Conference Proceedings (OSTI)

...S. Lampman, Energy-Efficient Heat-Treating Furnace Design and Operation, Heat Treating, Vol 4, ASM Handbook, ASM International,

37

Furnace Black Characterization  

NLE Websites -- All DOE Office Websites (Extended Search)

Furnace Black Furnace Black Characterization Sid Richardson Carbon Co Fort Worth, TX Dr. Michel Gerspacher 005F 2 Definitions Particle Aggregate = 20nm to 100nm "Diameter" = 200nm to 1,000nm "Length" = Set of Percolated Aggregates Particle (?) Aggregate Agglomerate Constituents Size = Tech/Scientific Challenge 005F 3 Furnace Process High Temperature Refractory Feedstock Oil Air Natural Gas Reaction Zone Quench 005F 4 Specific Surface Area 005F 5 Structure 3-D Morphology Key Characteristic Summary of Crystallographic Studies 005F 7 Methodologies 005F 8 Summary * For all furnace carbon black 12Å < L C < 17Å * Crystallite L a ≈ 25Å * Amorphous Carbon * No micropores * Very few surface groups (hetero atoms) { 005F 9 Effect of Heat Treatment on Amorphous Carbon

38

Air-Source Heat Pumps | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Air-Source Heat Pumps Air-Source Heat Pumps August 19, 2013 - 11:03am Addthis Air-source heat pumps transfer heat between the inside of a building and the outside air. How...

39

RADIATION HEAT TRANSFER ENVIRONMENT IN FIRE AND FURNACE TESTS OF RADIOACTIVE MATERIALS PAKCAGES  

SciTech Connect

The Hypothetical Accident Conditions (HAC) sequential test of radioactive materials packages includes a thermal test to confirm the ability of the package to withstand a transportation fire event. The test specified by the regulations (10 CFR 71) consists of a 30 minute, all engulfing, hydrocarbon fuel fire, with an average flame temperature of at least 800 C. The requirements specify an average emissivity for the fire of at least 0.9, which implies an essentially black radiation environment. Alternate test which provide equivalent total heat input at the 800 C time averaged environmental temperature may also be employed. When alternate tests methods are employed, such as furnace or gaseous fuel fires, the equivalence of the radiation environment may require justification. The effects of furnace and open confinement fire environments are compared with the regulatory fire environment, including the effects of gases resulting from decomposition of package overpack materials. The results indicate that furnace tests can produce the required radiation heat transfer environment, i.e., equivalent to the postulated pool fire. An open enclosure, with transparent (low emissivity) fire does not produce an equivalent radiation environment.

Smith, A

2008-12-31T23:59:59.000Z

40

List of Furnaces Incentives | Open Energy Information  

Open Energy Info (EERE)

Furnaces Incentives Furnaces Incentives Jump to: navigation, search The following contains the list of 688 Furnaces Incentives. CSV (rows 1-500) CSV (rows 501-688) Incentive Incentive Type Place Applicable Sector Eligible Technologies Active AEP (Central and North) - CitySmart Program (Texas) Utility Rebate Program Texas Commercial Industrial Institutional Local Government Schools Boilers Central Air conditioners Chillers Comprehensive Measures/Whole Building Custom/Others pending approval Energy Mgmt. Systems/Building Controls Furnaces Heat pumps Lighting Lighting Controls/Sensors Motor VFDs Motors Roofs Windows Yes AEP (Central, North and SWEPCO) - Commercial Solutions Program (Texas) Utility Rebate Program Texas Commercial Industrial Institutional Local Government Nonprofit

Note: This page contains sample records for the topic "furnaces heat air" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Condensing furnaces: Lessons from a utility  

SciTech Connect

for the last several years about 90% of the new natural gas furnaces installed in Wisconsin have been condensing furnaces and a number of lessons have been learned. If you avoid the common mistakes, condensing furnaces typically can deliver heating savings of 20-35 % assuming the old furnace was in the 60% AFUE range. This article describes the common mistakes and how to avoid them: outside air needed 100%; benefits of sealed combustion; follow the installation manual scrupulously; how to avoid potential problems; tips on venting.

Beers, J. [Madison Gas and Electric Company, WI (United States)

1994-11-01T23:59:59.000Z

42

Heating, Ventilation and Air Conditioning Efficiency  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Presented By: WALTER E. JOHNSTON, PE Presented By: WALTER E. JOHNSTON, PE CEM, CEA, CLEP, CDSM, CPE Heating, Ventilation and Air Conditioning (HVAC) system is to provide and maintain a comfortable environment within a building for the occupants or for the process being conducted Many HVAC systems were not designed with energy efficiency as one of the design factors 3 Air Air is the major conductor of heat. Lack of heat = air conditioning OR 4 Btu - Amount of heat required to raise one pound of water 1 F = 0.252 KgCal 1 Pound of Water = About 1 Pint of Water ~ 1 Large Glass 1 Kitchen Match Basics of Air Conditioning = 1 Btu 5 = 6 Low Cost Cooling Unit 7 8 Typical Design Conditions 75 degrees F temperature 50% relative humidity 30 - 50 FPM air movement

43

Zoned heating and air conditioning system  

SciTech Connect

This patent describes a zoned heating and air conditioning system comprising: a central air handling system with an air heating means and an air cooling means and a blower connected to an air duct system; thermostats each have heating and cooling set points, respectively associated with and located in different zones of a building; dampers respectively associated with each building zone positioned in the air duct system. Each damper has an open position allowing air into the respective zone from the duct system and a closed position; relay means for connecting one thermostat to the air handling system upon a call for heating or cooling by one thermostat and disconnecting all other thermostats by connecting one thermostat's connections between the thermostat and air handling system. Only one thermostat is connected to the air handling system at a time and the relay means disconnects one thermostat from the air handling system after one thermostat is satisified; and damper actuating means for unlocking each damper in one building zone responsive actuated by a respective zone thermostat connected to the air handling system by the relay means. The damper actuates means including a damper solenoid for each damper located adjacent each damper and connected to a respective zone thermostat. It unlocks each damper in one building zone responsive to being actuated by the respective zone thermostat and unlocks the dampers in one building zone when one thermostat is actuated while preventing the dampers in another thermostat's building zone from unlocking.

Beachboard, S.A.

1987-06-16T23:59:59.000Z

44

Rotating heat pipe for air-conditioning  

SciTech Connect

A unique rotary hermetic heat pipe is disclosed for transferring heat from an external source to an external heat sink. The heat pipe has a tapered condensing surface which is curved preferably to provide uniform pumping acceleration, the heat pipe being rotated at a velocity such that the component of centrifugal acceleration in an axial direction parallel to the tapered surface is greater than lG and so that the condensing surface is kept relatively free of liquid at any attitude. The heat pipe may be incorporated in an air conditioning apparatus so that it projects through a small wall opening. In the preferred air conditioning apparatus, a hollow hermetic air impeller is provided which contains a liquefied gaseous refrigerant, such as freon, and means are provided for compressing the refrigerant in the evaporator region of the heat pipe.

Gray, V.H.

1976-12-28T23:59:59.000Z

45

Energy Performance Comparison of Heating and Air Conditioning Systems for Multi-Family Residential Buildings  

SciTech Connect

The type of heating, ventilation and air conditioning (HVAC) system has a large impact on the heating and cooling energy consumption in multifamily residential buildings. This paper compares the energy performance of three HVAC systems: a direct expansion (DX) split system, a split air source heat pump (ASHP) system, and a closed-loop water source heat pump (WSHP) system with a boiler and an evaporative fluid cooler as the central heating and cooling source. All three systems use gas furnace for heating or heating backup. The comparison is made in a number of scenarios including different climate conditions, system operation schemes and applicable building codes. It is found that with the minimum code-compliant equipment efficiency, ASHP performs the best among all scenarios except in extremely code climates. WSHP tends to perform better than the split DX system in cold climates but worse in hot climates.

Wang, Weimin; Zhang, Jian; Jiang, Wei; Liu, Bing

2011-07-31T23:59:59.000Z

46

Tube furnace  

DOE Patents (OSTI)

A vermiculite insulated tube furnace is heated by a helically-wound resistance wire positioned within a helical groove on the surface of a ceramic cylinder, that in turn is surroundingly disposed about a doubly slotted stainless steel cylindrical liner. For uniform heating, the pitch of the helix is of shorter length over the two end portions of the ceramic cylinder. The furnace is of large volume, provides uniform temperature, offers an extremely precise programmed heating capability, features very rapid cool-down, and has a modest electrical power requirement.

Foster, K.G.; Frohwein, E.J.; Taylor, R.W.; Bowen, D.W.

1990-01-01T23:59:59.000Z

47

Furnace assembly  

DOE Patents (OSTI)

A method of and apparatus for heating test specimens to desired elevated temperatures for irradiation by a high energy neutron source. A furnace assembly is provided for heating two separate groups of specimens to substantially different, elevated, isothermal temperatures in a high vacuum environment while positioning the two specimen groups symmetrically at equivalent neutron irradiating positions.

Panayotou, Nicholas F. (Kennewick, WA); Green, Donald R. (Richland, WA); Price, Larry S. (Pittsburg, CA)

1985-01-01T23:59:59.000Z

48

Electric Resistance Heating Basics | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Electric Resistance Heating Basics Electric Resistance Heating Basics Electric Resistance Heating Basics August 16, 2013 - 3:10pm Addthis Electric resistance heat can be supplied by centralized forced-air electric furnaces or by heaters in each room. Electric resistance heating converts nearly all of the energy in the electricity to heat. Types of Electric Resistance Heaters Electric resistance heat can be provided by electric baseboard heaters, electric wall heaters, electric radiant heat, electric space heaters, electric furnaces, or electric thermal storage systems. Electric Furnaces With electric furnaces, heated air is delivered throughout the home through supply ducts and returned to the furnace through return ducts. Blowers (large fans) in electric furnaces move air over a group of three to seven

49

Electric Resistance Heating Basics | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Electric Resistance Heating Basics Electric Resistance Heating Basics Electric Resistance Heating Basics August 16, 2013 - 3:10pm Addthis Electric resistance heat can be supplied by centralized forced-air electric furnaces or by heaters in each room. Electric resistance heating converts nearly all of the energy in the electricity to heat. Types of Electric Resistance Heaters Electric resistance heat can be provided by electric baseboard heaters, electric wall heaters, electric radiant heat, electric space heaters, electric furnaces, or electric thermal storage systems. Electric Furnaces With electric furnaces, heated air is delivered throughout the home through supply ducts and returned to the furnace through return ducts. Blowers (large fans) in electric furnaces move air over a group of three to seven

50

Simulation model air-to-air plate heat exchanger  

Science Conference Proceedings (OSTI)

A simple simulation model of an air-to-air plate heat exchanger is presented. The model belongs to a collection of simulation models that allows the eflcient computer simulation of heating, ventilation, and air-conditioning (HVAC) systems. The main emphasis of the models is to shorten computation time and to use only input data that are known in the design process of an HVAC system. The target of the models is to describe the behavior of HVAC components in the part-load operation mode, which is becoming increasingly important in energy eficient HVAC systems. The models are intended to be used for yearly energy calculations or load calculations with time steps of about 10 minutes or larger. Short- time dynamic effects, which are of interest for different aspects of control theory, are neglected. The part-load behavior is expressed in terms of the nominal condition and the dimensionless variation of the heat transfer with change of mass flow and temperature. The effectiveness- NTU relations are used to parametrize the convective heat transfer at nominal conditions and to compute the part-load condition. If the heat transfer coefficients on the two exchanger sides are not equal (i. e. due to partial bypassing of air), their ratio can be easily calculated and set as a parameter. The model is static and uses explicit equations only. The explicit model formulation ensures short computation time and numerical stability, which allows using the model with sophisticated engineering methods like automatic system optimization. This paper fully outlines the algorithm description and its simplifications. It is not tailored for any particular simulation program to ensure easy implementation in any simulation program.

Wetter, Michael

1999-01-01T23:59:59.000Z

51

Heating, ventilation and air conditioning systems  

DOE Green Energy (OSTI)

A study is made of several outstanding issues concerning the commercial development of environmental control systems for electric vehicles (EVs). Engineering design constraints such as federal regulations and consumer requirements are first identified. Next, heating and cooling loads in a sample automobile are calculated using a computer model available from the literature. The heating and cooling loads are then used as a basis for estimating the electrical consumption that is to be expected for heat pumps installed in EVs. The heat pump performance is evaluated using an automobile heat pump computer model which has been developed recently at Oak Ridge National Laboratory (ORNL). The heat pump design used as input to the model consists of typical finned-tube heat exchangers and a hermetic compressor driven by a variable-speed brushless dc motor. The simulations suggest that to attain reasonable system efficiencies, the interior heat exchangers that are currently installed as automobile air conditioning will need to be enlarged. Regarding the thermal envelope of the automobile itself, calculations are made which show that considerable energy savings will result if steps are taken to reduce {open_quote}hot soak{close_quote} temperatures and if the outdoor air ventilation rate is well controlled. When these changes are made, heating and cooling should consume less than 10% of the total stored electrical energy for steady driving in most U.S. climates. However, this result depends strongly upon the type of driving: The fraction of total power for heating and cooling ({open_quote}range penalty{close_quote}) increases sharply for driving scenarios having low average propulsion power, such as stop-and-go driving.

Kyle, D.M. [Oak Ridge National Lab., TN (United States); Sullivan, R.A. [Dept. of Energy, Washington, DC (United States)

1993-02-01T23:59:59.000Z

52

Section D: SPACE HEATING  

U.S. Energy Information Administration (EIA)

Central warm-air furnace with ducts to individual rooms other than a heat pump ..... 03 Steam/Hot water ... REVERSE Heat pump ... Don't have a separate water heater ...

53

Electric Resistance Heating  

Energy.gov (U.S. Department of Energy (DOE))

Electric resistance heat can be supplied by centralized forced-air electric furnaces or by heaters in each room. Electric resistance heating converts nearly all of the energy in the electricity to...

54

Air-Source Heat Pump Basics | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Air-Source Heat Pump Basics Air-Source Heat Pump Basics Air-Source Heat Pump Basics August 19, 2013 - 11:03am Addthis Air-source heat pumps transfer heat between the inside of a building and the outside air. How Air-Source Heat Pumps Work This diagram of a split-system heat pump heating cycle shows refrigerant circulating through a closed loop that passes through the wall of a house. Inside the house the refrigerant winds through indoor coils, with a fan blowing across them, and outside the house is another fan and another set of coils, the outdoor coils. A compressor is between the coils on one half of the loop, and an expansion valve is between the coils on the other half. The diagram is explained in the caption. In heating mode, an air-source heat pump evaporates a refrigerant in the outdoor coil; as the liquid evaporates it pulls

55

HVAC Radial Air Bearing Heat Exchangers Research Project | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Radial Air Bearing Heat Exchangers Radial Air Bearing Heat Exchangers Research Project HVAC Radial Air Bearing Heat Exchangers Research Project The U.S. Department of Energy is currently conducting research into heating, ventilation, and air conditioning (HVAC) radial air bearing heat exchangers. Rotary air bearing heat exchanger technology simultaneously solves four long standing problems of conventional "fan-plus-finned-heat-sink" heat exchangers. Project Description This project seeks to design, fabricate, and test successive generations of prototype radial air bearing heat exchanger devices based on lessons learned and further insights into device optimization, computational fluid dynamic studies for parametric optimization and determination of scaling laws, and laboratory measurement of flow field and heat transfer

56

Air-Conditioning, Heating, and Refrigeration Institute (AHRI...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Conditioning, Heating, and Refrigeration Institute (AHRI) Regulatory Burden RFI Air-Conditioning, Heating, and Refrigeration Institute (AHRI) Regulatory Burden RFI These comments...

57

Investigation on a Microwave High-Temperature Air Heat Exchanger  

Science Conference Proceedings (OSTI)

In present paper, an energy efficient air heat exchanger, based on accumulation of the heat generated by microwave absorbing materials is presented according  ...

58

Improving Air Conditioner and Heat Pump Modeling  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Improving Air-Conditioner Improving Air-Conditioner and Heat Pump Modeling Building America Stakeholders Meeting Jon Winkler March 2, 2012 2 * How do you recommend the most cost-effective A/C? Simple Question 3 Solution Whole-House Simulation Tool A/C Information * SEER 13 * SEER 14 * SEER 15 * SEER 16 * SEER 17 * SEER 18 * SEER 21 Annualized Cooling Cost (Energy + Equipment) 4 Background * Power, capacity and SHR vary with: o Outdoor temperature o Entering wetbulb o Air mass flow rate o Part load ratio Power Sensible Capacity Latent Capacity * How to accurately and easily model A/C performance? 5 Background: Model Development * A/C modeling utilizes two types of input o Rated values (capacity, efficiency, etc.) o Performance curves Capacity 1 / Efficiency 6 Background: Manufacturer's Data

59

Control of energy use in a furnace  

Science Conference Proceedings (OSTI)

This patent describes, in a residential furnace of the type which is responsive to a thermostat and has an electronic ignitor, and a circulating air blower that May be operated on a continuous basis, an improved process of controlling the thermostat, electrical ignitor and blower in an ignition sequence of the furnace. It comprises: upon receiving a call for heat from a thermostat, checking to determine if the circulating air blower is on; if the blower is on, turning it off; and only after the blower is turned off, turning on the ignitor to initiate the combustion process.

Ballard, G.W.; Dempsey, D.J.

1990-01-02T23:59:59.000Z

60

Building Technologies Office: Air-Source Integrated Heat Pump Research  

NLE Websites -- All DOE Office Websites (Extended Search)

Air-Source Integrated Air-Source Integrated Heat Pump Research Project to someone by E-mail Share Building Technologies Office: Air-Source Integrated Heat Pump Research Project on Facebook Tweet about Building Technologies Office: Air-Source Integrated Heat Pump Research Project on Twitter Bookmark Building Technologies Office: Air-Source Integrated Heat Pump Research Project on Google Bookmark Building Technologies Office: Air-Source Integrated Heat Pump Research Project on Delicious Rank Building Technologies Office: Air-Source Integrated Heat Pump Research Project on Digg Find More places to share Building Technologies Office: Air-Source Integrated Heat Pump Research Project on AddThis.com... About Take Action to Save Energy Partner with DOE Activities Appliances Research Building Envelope Research

Note: This page contains sample records for the topic "furnaces heat air" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Building Technologies Office: HVAC Radial Air Bearing Heat Exchanger  

NLE Websites -- All DOE Office Websites (Extended Search)

Radial Air Bearing Radial Air Bearing Heat Exchanger Research Project to someone by E-mail Share Building Technologies Office: HVAC Radial Air Bearing Heat Exchanger Research Project on Facebook Tweet about Building Technologies Office: HVAC Radial Air Bearing Heat Exchanger Research Project on Twitter Bookmark Building Technologies Office: HVAC Radial Air Bearing Heat Exchanger Research Project on Google Bookmark Building Technologies Office: HVAC Radial Air Bearing Heat Exchanger Research Project on Delicious Rank Building Technologies Office: HVAC Radial Air Bearing Heat Exchanger Research Project on Digg Find More places to share Building Technologies Office: HVAC Radial Air Bearing Heat Exchanger Research Project on AddThis.com... About Take Action to Save Energy Partner with DOE

62

Simple Maintenance Saves Costly Furnace Repair/Replacement | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Simple Maintenance Saves Costly Furnace Repair/Replacement Simple Maintenance Saves Costly Furnace Repair/Replacement Simple Maintenance Saves Costly Furnace Repair/Replacement January 6, 2010 - 8:26am Addthis Chris Stewart Senior Communicator at DOE's National Renewable Energy Laboratory For the past few weeks, my forced-air gas furnace has been on the fritz. I blame this on the fact that I haven't been as diligent as I should have been with regular furnace maintenance, which includes: Checking the condition of the vent connection pipe and chimney Checking the physical integrity of the heat exchanger Adjusting the controls to provide optimum water and air temperature settings for both efficiency and comfort Having a technician perform a combustion-efficiency test Checking the combustion chamber for cracks. Testing for carbon monoxide

63

Air-Source Heat Pump Basics | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Source Heat Pump Basics Source Heat Pump Basics Air-Source Heat Pump Basics August 19, 2013 - 11:03am Addthis Air-source heat pumps transfer heat between the inside of a building and the outside air. How Air-Source Heat Pumps Work This diagram of a split-system heat pump heating cycle shows refrigerant circulating through a closed loop that passes through the wall of a house. Inside the house the refrigerant winds through indoor coils, with a fan blowing across them, and outside the house is another fan and another set of coils, the outdoor coils. A compressor is between the coils on one half of the loop, and an expansion valve is between the coils on the other half. The diagram is explained in the caption. In heating mode, an air-source heat pump evaporates a refrigerant in the outdoor coil; as the liquid evaporates it pulls

64

High temperature furnace  

DOE Patents (OSTI)

A high temperature furnace for use above 2000.degree.C is provided that features fast initial heating and low power consumption at the operating temperature. The cathode is initially heated by joule heating followed by electron emission heating at the operating temperature. The cathode is designed for routine large temperature excursions without being subjected to high thermal stresses. A further characteristic of the device is the elimination of any ceramic components from the high temperature zone of the furnace.

Borkowski, Casimer J. (Oak Ridge, TN)

1976-08-03T23:59:59.000Z

65

Solar assisted heat pump on air collectors: A simulation tool  

Science Conference Proceedings (OSTI)

The heating system of the bioclimatic building of the Greek National Centre for Renewable Energy Sources (CRES) comprises two heating plants: the first one includes an air source heat pump, Solar Air Collectors (SACs) and a heat distribution system (comprising a fan coil unit network); the second one is, mainly, a geothermal heat pump unit to cover the ground floor thermal needs. The SAC configuration as well as the fraction of the building heating load covered by the heating plant are assessed in two operation modes; the direct (hot air from the collectors is supplied directly to the heated space) and the indirect mode (warm air from the SAC or its mixture with ambient air is not supplied directly to the heated space but indirectly into the evaporator of the air source heat pump). The technique of the indirect mode of heating aims at maximizing the efficiency of the SAC, saving electrical power consumed by the compressor of the heat pump, and therefore, at optimizing the coefficient of performance (COP) of the heat pump due to the increased intake of ambient thermal energy by means of the SAC. Results are given for three research objectives: assessment of the heat pump efficiency whether in direct or indirect heating mode; Assessment of the overall heating plant efficiency on a daily or hourly basis; Assessment of the credibility of the suggested simulation model TSAGAIR by comparing its results with the TRNSYS ones. (author)

Karagiorgas, Michalis; Galatis, Kostas; Tsagouri, Manolis [Department of Mechanical Engineering Educators, ASPETE, N. Iraklio, GR 14121 (Greece); Tsoutsos, Theocharis [Environmental Engineering Dept., Technical University of Crete, Technical University Campus, GR 73100, Chania (Greece); Botzios-Valaskakis, Aristotelis [Centre for Renewable Energy Sources (CRES), 19th km Marathon Ave., GR 19001, Pikermi (Greece)

2010-01-15T23:59:59.000Z

66

Air-Source Heat Pumps | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Air-Source Heat Pumps Air-Source Heat Pumps Air-Source Heat Pumps June 24, 2012 - 3:35pm Addthis When properly installed, an air-source heat pump can deliver one-and-a-half to three times more heat energy to a home than the electrical energy it consumes. | Photo courtesy of iStockPhoto/YinYang. When properly installed, an air-source heat pump can deliver one-and-a-half to three times more heat energy to a home than the electrical energy it consumes. | Photo courtesy of iStockPhoto/YinYang. What does this mean for me? If you live in a cooling climate, an air-source heat pump is a good choice. If you live in a heating climate, watch for advanced air-source heat pumps coming on the market that operate well in sub-freezing temperatures. An air-source heat pump can provide efficient heating and cooling for your

67

Air source heat pump system for drying application  

Science Conference Proceedings (OSTI)

This paper investigates the performance of an air source heat pump for drying purpose. In order to evaluate the performance analysis; a simulation study has been done. The results of simulation of heat pump dryer for different evaporator temperatures ... Keywords: air source heat pump, coefficient of performance (COP), condenser temperature and compressor work, dryer, evaporator temperature

R. Daghigh; M. H. Ruslan; A. Zaharim; K. Sopian

2010-10-01T23:59:59.000Z

68

Final report on the project entitled: Highly Preheated Combustion Air System with/without Oxygen Enrichment for Metal Processing Furnaces  

SciTech Connect

This work develops and demonstrates a laboratory-scale high temperature natural gas furnace that can operate with/without oxygen enrichment to significantly improve energy efficiency and reduce emissions. The laboratory-scale is 5ft in diameter & 8ft tall. This furnace was constructed and tested. This report demonstrates the efficiency and pollutant prevention capabilities of this test furnace. The project also developed optical detection technology to control the furnace output.

Arvind Atreya

2007-02-16T23:59:59.000Z

69

Heating System Basics | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Heating System Basics Heating System Basics Heating System Basics August 16, 2013 - 2:32pm Addthis A variety of heating technologies are available today. You can learn more about what heating systems and heat pumps are commonly used today and how they work below. To learn how to use these technologies in your own home, see the Home Heating Systems section on Energy Saver. Furnaces and Boilers Furnaces heat air and distribute the heated air through a building using ducts. Boilers heat water, providing either hot water or steam for heating. Wood and Pellet Heating Provides a way to heat a building using biomass or waste sources. Electric Resistance Heating Can be supplied by centralized electric furnaces or by heaters in each room. Active Solar Heating Uses the sun to heat either air or liquid and can serve as a supplemental

70

Heating System Basics | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Heating System Basics Heating System Basics Heating System Basics August 16, 2013 - 2:32pm Addthis A variety of heating technologies are available today. You can learn more about what heating systems and heat pumps are commonly used today and how they work below. To learn how to use these technologies in your own home, see the Home Heating Systems section on Energy Saver. Furnaces and Boilers Furnaces heat air and distribute the heated air through a building using ducts. Boilers heat water, providing either hot water or steam for heating. Wood and Pellet Heating Provides a way to heat a building using biomass or waste sources. Electric Resistance Heating Can be supplied by centralized electric furnaces or by heaters in each room. Active Solar Heating Uses the sun to heat either air or liquid and can serve as a supplemental

71

Wabash County REMC - Residential Geothermal and Air-source Heat...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Other Agencies You are here Home Savings Wabash County REMC - Residential Geothermal and Air-source Heat Pump Rebate Program Wabash County REMC - Residential Geothermal...

72

Kosciusko REMC - Residential Geothermal and Air-source Heat Pump...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Other Agencies You are here Home Savings Kosciusko REMC - Residential Geothermal and Air-source Heat Pump Rebate Program Kosciusko REMC - Residential Geothermal and...

73

New and Underutilized Heating, Ventilation, and Air Conditioning...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

8, 2013 - 2:56pm Addthis The following heating, ventilation, and air conditioning (HVAC) technologies are underutilized within the Federal sector. These technologies have been...

74

Heat transfer and condensation of water vapour from humid air in compact heat exchangers.  

E-Print Network (OSTI)

??In this thesis, an experimental and simulation study of heat transfer in water-to-air compact-plate heat exchanger is presented. A compact-plate heat exchanger made of polypropylene,… (more)

Saraireh, Mohammad

2012-01-01T23:59:59.000Z

75

An Analysis of Price Determination and Markups in the Air-Conditioning and Heating Equipment Industry  

E-Print Network (OSTI)

of Commercial and Residential Air Conditioning and HeatingOF COMMERCIAL AND RESIDENTIAL AIR-CONDITIONING AND HEATINGand residential air-conditioning and heating equipment.

2004-01-01T23:59:59.000Z

76

Central Air Conditioners","Heat Pumps","Individual Air Conditioners...  

U.S. Energy Information Administration (EIA) Indexed Site

4,89,294,9,26,327,47,4 "District Heat ...",96,77,3,4,16,39,15,35,"Q","Q" "Boilers ...",581,474,58,39,211,3,96,223,18,14 "Packaged Heating Units...

77

Laboratory Testing of the Heating Capacity of Air-Source Heat Pumps at Low Outdoor Temperature Conditions  

Science Conference Proceedings (OSTI)

Air-source heat pump systems offer an alternative to the common heating, ventilating, and air conditioning (HVAC) configuration of single split unitary air conditioners with gas heating. In simple terms, heat pumps are traditional air conditioning units with the added capability of running in reverse as required by the building load. Thus, where the traditional air conditioning unit has an indoor evaporator to remove heat from the space and an outdoor condenser to reject heat to the ambient environment, ...

2010-12-22T23:59:59.000Z

78

WaterFurnace Renewable Energy Inc formerly WaterFurnace Industries Inc WFI  

Open Energy Info (EERE)

WaterFurnace Renewable Energy Inc formerly WaterFurnace Industries Inc WFI WaterFurnace Renewable Energy Inc formerly WaterFurnace Industries Inc WFI Jump to: navigation, search Name WaterFurnace Renewable Energy Inc (formerly: WaterFurnace Industries, Inc (WFI)) Place Indiana Zip 46809 Sector Geothermal energy Product WaterFurnace develops and manufactures geothermal heating and cooling systems. References WaterFurnace Renewable Energy Inc (formerly: WaterFurnace Industries, Inc (WFI))[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. WaterFurnace Renewable Energy Inc (formerly: WaterFurnace Industries, Inc (WFI)) is a company located in Indiana . References ↑ "WaterFurnace Renewable Energy Inc (formerly: WaterFurnace Industries, Inc (WFI))"

79

Performance comparison between air and liquid residential solar heating systems  

SciTech Connect

Comparisons of system performance for the flat plate liquid-heating system in CSU Solar House I, the evacuated-tube collector system in Solar House I, and the flat plate air-heating system in CSU Solar House II are described for selected months of the 1976 and 1977 heating seasons. Only space and domestic water heating data are compared. The flat plate air- and liquid-heating collectors operating with complete heating systems have nearly equal efficiencies when based upon solar flux while the collector fluids are flowing, but approximately 40% more energy is collected during a heating season with the air-heating system because the air system operates over a longer period of the day. On the basis of short-term data, the evacuated tube collector array on Solar House I is about 27% more efficient than the flat plate air-heating collector array on Solar House II based on gross roof area occupied by the collectors and manifolds.

Karaki, S.; Duff, W.S.; Loef, G.O.G.

1978-01-01T23:59:59.000Z

80

Energy Basics: Air-Source Heat Pumps  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

from ductwork that protrudes through a wall or roof. More Information Visit the Energy Saver website for more information about the selection and performance of air-source...

Note: This page contains sample records for the topic "furnaces heat air" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Self-defrosting recuperative air-to-air heat exchanger  

DOE Patents (OSTI)

A heat exchanger includes a stationary spirally or concentrically wound heat exchanger core with rotating baffles on upper and lower ends thereof. The rotating baffles include rotating inlets and outlets which are in communication with respective fixed inlets and outlets via annuli. The rotation of the baffles causes a concurrent rotation of the temperature distribution within the stationary exchanger core, thereby preventing frost build-up in some applications and preventing the formation of hot spots in other applications.

Drake, Richard L. (Delmar, NY)

1993-01-01T23:59:59.000Z

82

Intelligent Control of Heating, Ventilating and Air Conditioning Systems  

Science Conference Proceedings (OSTI)

This paper proposed a simulation-optimization energy saving strategy for heating, ventilating and air conditioning (HVAC) systems' condenser water loop through intelligent control of single speed cooling towers' components. An analysis of system components ...

Patrick Low Kie; Lau Bee Theng

2009-07-01T23:59:59.000Z

83

Improving Air-Conditioner and Heat Pump Modeling (Presentation)  

SciTech Connect

A new approach to modeling residential air conditioners and heat pumps allows users to model systems by specifying only the more readily-available SEER/EER/HSPF-type metrics. Manufacturer data was used to generate full sets of model inputs for over 450 heat pumps and air conditioners. A sensitivity analysis identified which inputs can be safely defaulted 'behind-the-scenes' without negatively impacting the reliability of energy simulations.

Winkler, J.

2012-03-01T23:59:59.000Z

84

Improving Air-Conditioner and Heat Pump Modeling (Presentation)  

SciTech Connect

A new approach to modeling residential air conditioners and heat pumps allows users to model systems by specifying only the more readily-available SEER/EER/HSPF-type metrics. Manufacturer data was used to generate full sets of model inputs for over 450 heat pumps and air conditioners. A sensitivity analysis identified which inputs can be safely defaulted 'behind-the-scenes' without negatively impacting the reliability of energy simulations.

Winkler, J.

2012-03-01T23:59:59.000Z

85

Development of a Dedicated 100 Percent Ventilation Air Heat Pump  

Science Conference Proceedings (OSTI)

The concept of using dedicated 100 percent ventilation makeup air conditioning units to meet indoor air quality standards is attractive because of the inherent advantages. However, it is challenging to design and build direct expansion unitary equipment for this purpose. EPRI teamed with ClimateMaster to develop and test a prototype of a vapor compression heat pump to advance the state of the art in such equipment. The prototype unit provides deep dehumidification and cooling of ventilation air in the su...

2000-12-14T23:59:59.000Z

86

Memorandum To: GENERAL COUNSEL, DEPARTMENT OF ENERGY (DOE) From: JONATHAN MELCHI, HEATING, AIR-CONDITIONING AND REFRIGERATION  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

To: GENERAL COUNSEL, DEPARTMENT OF ENERGY (DOE) To: GENERAL COUNSEL, DEPARTMENT OF ENERGY (DOE) From: JONATHAN MELCHI, HEATING, AIR-CONDITIONING AND REFRIGERATION DISTRIBUTORS INTERNATIONAL (HARDI) Date: 1/12/2012 Subject: EX PARTE COMMUNICATION MEMO DOE ATTENDEES: Ashley Armstrong, John Cymbalsky, David Case, Laura Barhydt HARDI ATTENDEES: Talbot Gee, Jonathan Melchi AREAS OF DISCUSSION: DOE Framework Document and Stakeholder Meeting regarding the Enforcement of the updated Energy Conservation Standards for Air Conditioners, Furnaces and Heat Pumps. The meeting took place on Thursday January 5 th , 2012 from 2pm to 3-pm. The following topics were discussed. 1.) Sell-Through. HARDI asked for clarification on the DOE's notation on the Framework Document

87

Commercial Air-Source Heat Pumps, Purchasing Specifications for Energy-Efficient Products (Fact Sheet)  

SciTech Connect

Energy efficiency purchasing specifications for federal procurements of commercial air-source heat pumps.

Not Available

2011-02-11T23:59:59.000Z

88

Performance Analysis of Air-Source Variable Speed Heat Pumps and Various Electric Water Heating Options  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Analysis of Air- Analysis of Air- Source Variable Speed Heat Pumps and Various Electric Water Heating Options Jeffrey Munk Oak Ridge National Laboratory 2 Managed by UT-Battelle for the U.S. Department of Energy Presentation_name Acknowledgements * Tennessee Valley Authority - David Dinse * U.S. Department of Energy * Roderick Jackson * Tony Gehl * Philip Boudreaux * ZEBRAlliance 3 Managed by UT-Battelle for the U.S. Department of Energy Presentation_name Overview * Electric Water Heating Options - Conventional Electric Water Heaters - Heat Pump Water Heaters * Air-Source * Ground-Source - Solar Thermal Water Heater * Variable Speed Heat Pumps - Energy Use Analysis - Measured Performance - Operational Characteristics 4 Managed by UT-Battelle for the U.S. Department of Energy Presentation_name Water Heating Options

89

Inverter control systems in the residential heat pump air conditioner  

SciTech Connect

A compressor capacity control with an inverter has been considered from the viewpoint of high energy saving in a refrigerating cycle. However, the system has not been put into practical use because of high initial cost, technical problems of electronic parts, and complexity of system control. In this connection, we developed the new inverter-controlled heat-pump air conditioner by using the latest electronics and refrigeration technology. This paper discusses the trend of energy saving in air conditioners in Japan and the objectives of developing the inverter controlled air conditioner. It also discusses the following items with respect to the inverter controlled air conditioner and the effects of employing an inverter: 1. Inverter for air conditioning; 2. Refrigeration cycle; 3. Air conditioner control with inverter.

Shimma, Y.; Tateuchi, T.; Suglura, H.

1985-01-01T23:59:59.000Z

90

Experimental Research of Air Source Heat Pump Frosting and Defrosting in a Double Stage-Coupling Heat Pump  

E-Print Network (OSTI)

In a double stage-coupling heat pump, comprising an air source and water loop heat pump, the 13~20 ? low temperature water is supplied to the water loop heat pump unit. The water loop heat pump can extract heat from the water and heat the indoor air. The most common method of air source heat pump frost removal is reverse-cycle defrost. During the defrosting operation, the heat pump runs in the cooling mode. The defrost process is accomplished by reversing the normal heating mode. In this paper, the effect of the heat storage tank to the air source heat pump defrosting is test. Owing to the existence of the heat storage tank, thermal inertia of the loop is relatively high. The frosting and defrosting course of the air source heat pump have little effect on the room temperature.

Wang, Z.; Gu, J.; Lu, Z.

2006-01-01T23:59:59.000Z

91

The effects of outdoor heat exchanger hydrophobic treatment on the performance of an air source heat pump.  

E-Print Network (OSTI)

??The effects of outdoor heat exchanger hydrophobic treatment on the performance of an air source heat pump were investigated. The base case tests used a… (more)

Parker, Brandon DeWayne

2012-01-01T23:59:59.000Z

92

Duct Systems in large commercial buildings: Physical characterization, air leakage, and heat conduction gains  

E-Print Network (OSTI)

Air Leakage, and Heat Conduction Gains William 1. Fisk,0.75 to 0.90; thus, heat conduction decreased the coolingby air leakage or heat conduction, because these ducts are

Fisk, W.J.

2011-01-01T23:59:59.000Z

93

Advanced Variable Speed Air-Source Integrated Heat Pump  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

variable speed air-source variable speed air-source integrated heat pump (AS-IHP) - CRADA Van D. Baxter Oak Ridge National Laboratory vdb@ornl.gov; 865-574-2104 April 3, 2013 Development of advanced HVAC/WH system options for efficient residential or small commercial buildings, new const. or retrofit * ET R&D project in support of DOE/BTO Goal of 50% Reduction in Building Energy Use by 2030 IHP concept - all HVAC & WH services integrated into

94

Advanced Variable Speed Air-Source Integrated Heat Pump  

NLE Websites -- All DOE Office Websites (Extended Search)

variable speed air-source variable speed air-source integrated heat pump (AS-IHP) - CRADA Van D. Baxter Oak Ridge National Laboratory vdb@ornl.gov; 865-574-2104 April 3, 2013 Development of advanced HVAC/WH system options for efficient residential or small commercial buildings, new const. or retrofit * ET R&D project in support of DOE/BTO Goal of 50% Reduction in Building Energy Use by 2030 IHP concept - all HVAC & WH services integrated into

95

Evaluation of solar-air-heating central-receiver concepts  

DOE Green Energy (OSTI)

The potential of seven proposed air-heating central receiver concepts are evaluated based on an independent, uniform of each one's performance and cost. The concepts include: metal tubes, ceramic tubes, sodium heat pipes, ceramic matrix, ceramic domes, small particles, and volumetric heat exchange. The selection of design points considered in the analysis, the method and ground rules used in formulating the conceptual designs are discussed, and each concept design is briefly described. The method, ground rules, and models used in the performance evaluation and cost analysis and the results are presented. (LEW)

Bird, S.P.; Drost, M.K.; Williams, T.A.; Brown, D.R.; Fort, J.A.; Garrett-Price, B.A.; Hauser, S.G.; McLean, M.A.; Paluszek, A.M.; Young, J.K.

1982-06-01T23:59:59.000Z

96

Home heating system  

SciTech Connect

A home heating system is disclosed that has a furnace with a combustion chamber for burning fuel and creating heat, and a chimney with a draft therein. An improvement is described that has an exhaust flue connected between the combustion chamber and the chimney for venting heated exhaust products from the furnace, a heat reclaimer connected into the exhaust flue between the combustion chamber and the chimney for reclaiming heat from the heated exhaust product, and an outside air line for supplying air from the outside of the house to the combustion chamber. A first flue portion of the exhaust flue is connected between the combustion chamber and the heat reclaimer, and a second insulated flue portion of the exhaust flue is connected between the heat reclaimer and the chimney. An outside air by-pass or balancing line is connected between the outside air line and the chimney for satisfying the chimney suction at flame-out. A flow sensing and regulating device may be connected into the outside air line for regulating the flow or air so that outside air is supplied to the furnace only when fuel is burned therein.

Bellaff, L.

1980-03-25T23:59:59.000Z

97

The effects of improved residential furnace filtration on airborne particles  

SciTech Connect

Forced air furnaces with distributed ducting systems have always had an air filter, but traditionally the filter quality was only adequate to protect the furnace fan and heat exchanger from debris. In the past several years, there has been an increasing number of more effective particulate filters that are being marketed to reduce airborne particulate or dust. These include upgraded panel filters, passive electrostatic, active electrostatic, and HEPA or near-HEPA variants. Consumers are bewildered by the lack of standardized and comprehensible performance results and need better advice on whether it would be useful for them to upgrade their current furnace filter. In order to help them make these decisions, the whole range of available furnace filters were tested in six occupied houses. The filter efficiency was determined by particulate measurement in the ducting system before and after the filter. Indoor particulates were measured in a bedroom and living room, and outdoor levels were monitored simultaneously. Testing encompassed several weeks in each house, and the results are available in the whole range of particle sizes. The project also looked at the air-cleaning effectiveness of a stand-alone air cleaner and at the ozone production of electrostatic precipitators installed in 20 houses. Test results will be helpful in specifying suitable filtration for houses.

Fugler, D.; Bowser, D.; Kwan, W.

2000-07-01T23:59:59.000Z

98

Furnace Blower Electricity: National and Regional Savings Potential  

Science Conference Proceedings (OSTI)

Currently, total electricity consumption of furnaces is unregulated, tested at laboratory conditions using the DOE test procedure, and is reported in the GAMA directory as varying from 76 kWh/year to 1,953 kWh/year. Furnace blowers account for about 80percent of the total furnace electricity consumption and are primarily used to distribute warm air throughout the home during furnace operation as well as distribute cold air during air conditioning operation. Yet the furnace test procedure does not provide a means to calculate the electricity consumption during cooling operation or standby, which account for a large fraction of the total electricity consumption. Furthermore, blower electricity consumption is strongly affected by static pressure. Field data shows that static pressure in the house distribution ducts varies widely and that the static pressure used in the test procedure as well as the calculated fan power is not representative of actual field installations. Therefore, accurate determination of the blower electricity consumption is important to address electricity consumption of furnaces and air conditioners. This paper compares the potential regional and national energy savings of two-stage brushless permanent magnet (BPM) blower motors (the blower design option with the most potential savings that is currently available in the market) to single-stage permanent split capacitor (PSC) blower motors (the most common blower design option). Computer models were used to generate the heating and cooling loads for typical homes in 16 different climates which represent houses throughout the United States. The results show that the potential savings of using BPM motors vary by region and house characteristics, and are very strongly tied to improving house distribution ducts. Savings decrease dramatically with increased duct pressure. Cold climate locations will see savings even in the high static pressure duct situations, while warm climate locations will see less savings overall and negative savings in the high static pressure duct situations. Moderate climate locations will see little or no savings.

Florida Solar Energy Center; Franco, Victor; Franco, Victor; Lutz, Jim; Lekov, Alex; Gu, Lixing

2008-05-16T23:59:59.000Z

99

Tritium extraction furnace  

DOE Patents (OSTI)

This invention is comprised of apparatus for heating an object such as a nuclear target bundle to release and recover hydrogen and contain the disposable residue for disposal. The apparatus comprises an inverted furnace, a sleeve/crucible assembly for holding and enclosing the bundle, conveying equipment for placing the sleeve onto the crucible and loading the bundle into the sleeve/crucible, a lift for raising the enclosed bundle into the furnace, and hydrogen recovery equipment including a trap and strippers, all housed in a containment having, negative internal pressure. The crucible/sleeve assembly has an internal volume that is sufficient to enclose and hold the bundle before heating; the crucible`s internal volume is sufficient by itself to hold and enclose the bundle`s volume after heating. The crucible can then be covered and disposed of, the sleeve, on the other hand, can be reused.

Heung, L.K.

1992-12-31T23:59:59.000Z

100

Field Demonstration of the Thermostone III Electric Thermal Storage Furnace  

Science Conference Proceedings (OSTI)

Heat storage furnaces use low-cost, off-peak electricity to satisfy all of a customer's heating needs. This field demonstration showed that prototype heat storage furnaces maintained comfort under diverse climate conditions, usage patterns, and lengths of off-peak periods. In addition, these furnaces effectively shifted the load to off-peak hours.

1992-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "furnaces heat air" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Development of solar driven absorption air conditioners and heat pumps  

DOE Green Energy (OSTI)

The objective of this project is the development of absorption refrigeration systems for solar active heating and cooling applications. The approaches being investigated are those using air-cooled condenser-absorbers and those leading to coefficient of performances (COP) that increase continuously with heat source temperature. This is primarily an experimental project, with the emphasis on designing, fabricating and testing absorption chillers in operating regimes that are particularly suited for solar energy applications. The first phase of this project has been concluded and has experimentally demonstrated that the conventional single-effect ammonia-water absorption cycle can be used (with minor modifications) for solar cooling. The second phase of this project explores the commercial potential of the single-effect (SE) NH/sub 3//H/sub 2/O absorption air conditioner. (WHK)

Dao, K.; Wahlig, M.; Wali, E.; Rasson, J.; Molishever, E.

1980-03-01T23:59:59.000Z

102

Residential Two-Stage Gas Furnaces - Do They Save Energy?  

SciTech Connect

Residential two-stage gas furnaces account for almost a quarter of the total number of models listed in the March 2005 GAMA directory of equipment certified for sale in the United States. Two-stage furnaces are expanding their presence in the market mostly because they meet consumer expectations for improved comfort. Currently, the U.S. Department of Energy (DOE) test procedure serves as the method for reporting furnace total fuel and electricity consumption under laboratory conditions. In 2006, American Society of Heating Refrigeration and Air-conditioning Engineers (ASHRAE) proposed an update to its test procedure which corrects some of the discrepancies found in the DOE test procedure and provides an improved methodology for calculating the energy consumption of two-stage furnaces. The objectives of this paper are to explore the differences in the methods for calculating two-stage residential gas furnace energy consumption in the DOE test procedure and in the 2006 ASHRAE test procedure and to compare test results to research results from field tests. Overall, the DOE test procedure shows a reduction in the total site energy consumption of about 3 percent for two-stage compared to single-stage furnaces at the same efficiency level. In contrast, the 2006 ASHRAE test procedure shows almost no difference in the total site energy consumption. The 2006 ASHRAE test procedure appears to provide a better methodology for calculating the energy consumption of two-stage furnaces. The results indicate that, although two-stage technology by itself does not save site energy, the combination of two-stage furnaces with BPM motors provides electricity savings, which are confirmed by field studies.

Lekov, Alex; Franco, Victor; Lutz, James

2006-05-12T23:59:59.000Z

103

Enameling Furnaces  

Science Conference Proceedings (OSTI)

Table 13 Cycles for firing ground-coated and cover-coated sheet steel parts in a continuous furnace...Architectural panels 16-22 805 1480 2-4 Home laundry equipment 18-22 805 1480 4-5 Water heater tanks 7-16 870 1600 8-12 Range equipment 18-24 805 1480 3-5 Sanitary ware 14-18 815 1500 4-6 Signs 16-22 805 1480 3-5 (a) Temperature varies with composition of frit. (b) Time in hot zone of furnace...

104

Furnace Blower Electricity: National and Regional Savings Potential  

NLE Websites -- All DOE Office Websites (Extended Search)

Furnace Blower Electricity: National and Regional Savings Potential Furnace Blower Electricity: National and Regional Savings Potential Title Furnace Blower Electricity: National and Regional Savings Potential Publication Type Report LBNL Report Number LBNL-417E Year of Publication 2008 Authors Franco, Victor H., James D. Lutz, Alexander B. Lekov, and Lixing Gu Document Number LBNL-417E Pagination 14 Date Published August 1 Publisher Lawrence Berkeley National Laboratory City Berkeley Abstract Currently, total electricity consumption of furnaces is unregulated, tested at laboratory conditions using the DOE test procedure, and is reported in the GAMA directory as varying from 76 kWh/year to 1,953 kWh/year. Furnace blowers account for about 80% of the total furnace electricity consumption and are primarily used to distribute warm air throughout the home during furnace operation as well as distribute cold air during air conditioning operation. Yet the furnace test procedure does not provide a means to calculate the electricity consumption during cooling operation or standby, which account for a large fraction of the total electricity consumption. Furthermore, blower electricity consumption is strongly affected by static pressure. Field data shows that static pressure in the house distribution ducts varies widely and that the static pressureused in the test procedure as well as the calculated fan power is not representative of actual field installations. Therefore, accurate determination of the blower electricity consumption is important to address electricity consumption of furnaces and air conditioners. This paper compares the potential regional and national energy savings of two-stage brushless permanent magnet (BPM) blower motors (the blower design option with the most potential savings that is currently available in the market) to single-stage permanent split capacitor (PSC) blower motors (the most common blower design option). Computer models were used to generate the heating and cooling loads for typical homes in 16 different climates which represent houses throughout the United States. The results show that the potential savings of using BPM motors vary by region and house characteristics, and are very strongly tied to improving house distribution ducts. Savings decrease dramatically with increased duct pressure. Cold climate locations will see savings even in the high static pressure duct situations, whilewarm climate locations will see less savings overall and negative savings in the high static pressure duct situations. Moderate climate locations will see little or no savings.

105

CenterPoint Energy - Residential Gas Heating Rebates | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

CenterPoint Energy - Residential Gas Heating Rebates CenterPoint Energy - Residential Gas Heating Rebates CenterPoint Energy - Residential Gas Heating Rebates < Back Eligibility Residential Savings Category Heating & Cooling Commercial Heating & Cooling Heating Appliances & Electronics Water Heating Program Info State Arkansas Program Type Utility Rebate Program Rebate Amount Storage Tank Water Heater: $75 Tankless Water Heater: $500 Forced-Air Furnace: $400 - $600 Forced-Air Furnace (Back-Up System): $125 - $175 Hydronic Heating System: $400 Provider CenterPoint Energy CenterPoint Energy offers gas heating and water heating equipment rebates to its residential customers. Eligible equipment includes furnaces, back-up furnace systems, hydronic heaters, storage water heaters and tankless water heaters. All equipment must meet program requirements for efficiency and

106

Fetz Plumbing, Heating & Air Conditioning | Open Energy Information  

Open Energy Info (EERE)

Fetz Plumbing, Heating & Air Conditioning Fetz Plumbing, Heating & Air Conditioning Jump to: navigation, search Name Fetz Plumbing, Heating & Air Conditioning Address 115 Washington Street - P.O. Box 516 Place Urbana, Ohio Zip 43078 Sector Efficiency, Geothermal energy, Services, Solar Product Installation; Maintenance and repair Phone number 937-652-1136 Website http://fetzphc.com Coordinates 40.108862°, -83.757291° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":40.108862,"lon":-83.757291,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

107

Artificial neural network control of a heat exchanger in a closed flow air circuit  

Science Conference Proceedings (OSTI)

This paper experimentally investigates the control of a heat exchanger in a closed flow air circuit. The temperature inside the test section of the test facility has been maintained at a set value by variation of air flow rate over the heat exchanger ... Keywords: Air circuit, Heat exchanger, Multi-layer perceptron, Neural network control, PID control

Kapil Varshney; P. K. Panigrahi

2005-07-01T23:59:59.000Z

108

Batch Preheat for glass and related furnace processing operations  

SciTech Connect

The objectives that our development work addressed are: (1) Establish through lab tests a salt eutectic with a melting point of about 250 F and a working range of 250 to 1800 F. (2) Establish the most economical material of construction for the screened salt eutectics identified in the first objective. (3) Establish the material of construction for the salt heater liner. Objectives 2 and 3 were determined through corrosion tests using selected metallurgical samples. Successful completion of the above-stated goals will be incorporated in a heat recovery design that can be used in high temperature processes and furnaces, typical of which is the glass melting process. The process design incorporates the following unit operations: a vertical batch heater (whereby the batch flows down through tubes in a shell and tube exchanger; a molten salt eutectic is circulated on the shell side); a molten salt heater utilizing furnace flue gas in a radiation type heater (molten salt is circulated in the annular space between the inner and outer shells of the vertical heater, and flue gas passes from the furnace exhaust through the inner shell of the heater); a cantilever type molten salt circulating pump; and a jacketed mixer/conveyor to drive off moisture from the batch prior to feeding the batch to the vertical batch heater. Historically, radiation heaters, when applied to glass or fiberglass furnace recuperation, have experienced failures due to uneven heat flux rates, which increases internal stresses and spot overheating conditions. Low heat transfer coefficients result in requirements for large heat transfer surface areas in gas to gas or gas to air exchangers. Fouling is another factor that results in lower unit availability and reduced performance. These factors are accommodated in this process by the incorporation of several design features. The salt heater will be a vertical double wall radiation design, similar to radiation air heaters used in high temperature heat recovery. The unit utilizes an inner shell that the furnace exhaust gas passes through: this provides essentially a self-cleaning surface. Utilization of radiation air heaters in fiberglass furnaces has demonstrated that the inner shell provides a surface from which molten ash can drain down. The molten salt eutectic will be pumped through the annulus between this inner wall and the outer wall of the unit. The annular space tempering via the molten salt will promote more uniform expansion for the unit, and thereby promote more uniform heat flux rates. Heat transfer would be via radiation mainly, with a minor convective contributor.

Energy & Environmental Resources, Inc

2002-08-12T23:59:59.000Z

109

Optimized Design of a Furnace Cooling System  

E-Print Network (OSTI)

This paper presents a case study of manufacturing furnace optimized re-design. The bottleneck in the production process is the cooling of heat treatment furnaces. These ovens are on an approximate 24-hour cycle, heating for 12 hours and cooling for 12 hours. Pressurized argon and process water are used to expedite cooling. The proposed modifications aim to minimize cycling by reducing cooling time; they are grouped into three fundamental mechanisms. The first is a recommendation to modify current operating procedures. This entails opening the furnace doors at higher than normal temperatures. A furnace temperature model based on current parameters is used to show the reduction in cooling time in response to opening the furnace doors at higher temperatures. The second mechanism considers the introduction of forced argon convection. Argon is used in the process to mitigate part oxidation. Cycling argon through the furnace during cooling increases convection over the parts and removes heat from the furnace envelope. Heat transfer models based on convective Nusselt correlations are used to determine the increase in heat transfer rate. The last mechanism considers a modification to the current heat exchanger. By decreasing the temperature of the water jacket and increasing heat exchanger efficiency, heat transfer from the furnace is increased and cooling time is shortened. This analysis is done using the Effectiveness-NTU method.

Morelli, F.; Bretschneider, R.; Dauzat, J.; Guymon, M.; Studebaker, J.; Rasmussen, B. P.

2013-01-01T23:59:59.000Z

110

Kosciusko REMC - Residential Geothermal and Air-source Heat Pump Rebate  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Kosciusko REMC - Residential Geothermal and Air-source Heat Pump Kosciusko REMC - Residential Geothermal and Air-source Heat Pump Rebate Program Kosciusko REMC - Residential Geothermal and Air-source Heat Pump Rebate Program < Back Eligibility Residential Savings Category Heating & Cooling Commercial Heating & Cooling Heat Pumps Appliances & Electronics Water Heating Maximum Rebate Maximum of two rebates per household Program Info State Indiana Program Type Utility Rebate Program Rebate Amount Geothermal System: $250 Air-Source Heat Pump: $150 Electric Water Heater: $75 - $125 Provider Kosciusko REMC Kosciusko REMC offers rebates (as bill credits) to residential members for the purchase and installation of high efficiency air-source heat pumps, geothermal heat pumps, and electric water heaters. For each purchase of an

111

Wabash County REMC - Residential Geothermal and Air-source Heat Pump Rebate  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Wabash County REMC - Residential Geothermal and Air-source Heat Wabash County REMC - Residential Geothermal and Air-source Heat Pump Rebate Program Wabash County REMC - Residential Geothermal and Air-source Heat Pump Rebate Program < Back Eligibility Residential Savings Category Heating & Cooling Commercial Heating & Cooling Heat Pumps Appliances & Electronics Water Heating Maximum Rebate Geothermal: $750 Air Source Heat Pumps: $625 One rebate per house Program Info State Indiana Program Type Utility Rebate Program Rebate Amount Air Source Heat Pumps: $125 - $625/ton Geothermal Heat Pumps: $150 - $750/ton Water Heater: $100 Provider Wabash County REMC Wabash Rural Electric Membership Cooperative (REMC) is a member-owned electric distribution organization that provides service to customers in north-central Indiana. To encourage energy efficiency, Wabash County REMC

112

Measurement of gas species, temperatures, coal burnout, and wall heat fluxes in a 200 MWe lignite-fired boiler with different overfire air damper openings  

SciTech Connect

Measurements were performed on a 200 MWe, wall-fired, lignite utility boiler. For different overfire air (OFA) damper openings, the gas temperature, gas species concentration, coal burnout, release rates of components (C, H, and N), furnace temperature, and heat flux and boiler efficiency were measured. Cold air experiments for a single burner were conducted in the laboratory. The double-swirl flow pulverized-coal burner has two ring recirculation zones starting in the secondary air region in the burner. As the secondary air flow increases, the axial velocity of air flow increases, the maxima of radial velocity, tangential velocity and turbulence intensity all increase, and the swirl intensity of air flow and the size of recirculation zones increase slightly. In the central region of the burner, as the OFA damper opening widens, the gas temperature and CO concentration increase, while the O{sub 2} concentration, NOx concentration, coal burnout, and release rates of components (C, H, and N) decrease, and coal particles ignite earlier. In the secondary air region of the burner, the O{sub 2} concentration, NOx concentration, coal burnout, and release rates of components (C, H, and N) decrease, and the gas temperature and CO concentration vary slightly. In the sidewall region, the gas temperature, O{sub 2} concentration, and NOx concentration decrease, while the CO concentration increases and the gas temperature varies slightly. The furnace temperature and heat flux in the main burning region decrease appreciably, but increase slightly in the burnout region. The NOx emission decreases from 1203.6 mg/m{sup 3} (6% O{sub 2}) for a damper opening of 0% to 511.7 mg/m{sup 3} (6% O{sub 2}) for a damper opening of 80% and the boiler efficiency decreases from 92.59 to 91.9%. 15 refs., 17 figs., 3 tabs.

Jianping Jing; Zhengqi Li; Guangkui Liu; Zhichao Chen; Chunlong Liu [Harbin Institute of Technology, Harbin (China). School of Energy Science and Engineering

2009-07-15T23:59:59.000Z

113

Comparative evaluation of the impacts of domestic gas and electric heat pump heating on air pollution in California  

SciTech Connect

Residential space and water heating accounts for approximately 12% of California's and 15% of the United States, energy consumption. most Of the residential heating is by direct use of natural gas. combustion of natural gas is a contributor to the overall air pollution,, especially CO and NO{sub x} in the urban areas. Another efficient method for domestic water and space heating is use of electric heat pumps, the most popular category of which uses air as its heat source. Electric heat pumps do not emit air pollutants at the point of use, but use electric power, which is a major contributor to air pollution at its point of generation from fossil fuels. It is the specific objective of this report to evaluate and compare the energy efficiency and source air pollutants of natural gas heaters and electric heat pumps used for domestic heating. Effect of replacing natural gas heaters with electric heat pumps on air pollutant emissions due to domestic heating in two urban areas and in California as a whole has also been evaluated. The analysis shows that with the present state of technology, electric heat pumps have higher heating efficiencies than natural gas heaters. Considering the current electricity generation mix in the US, electric heat pumps produce two to four times more NO{sub x}, much less CO, and comparable amount of CO{sub 2} per unit of useful heating energy compared to natural gas heaters. With California mix, electric heat pumps produce comparable NO{sub x} and much less CO and approximately 30% less CO{sub 2} per unit heat output. Replacement of natural gas heaters with electric heat pumps will slightly increase the overall NO{sub x}, and reduce CO and CO{sub 2} emissions in California. The effect of advanced technology power generation and heat pump heating has also been analyzed.

Ganji, A. (San Francisco State Univ., CA (United States). Div. of Engineering)

1992-07-01T23:59:59.000Z

114

Comparative evaluation of the impacts of domestic gas and electric heat pump heating on air pollution in California. Final report  

SciTech Connect

Residential space and water heating accounts for approximately 12% of California`s and 15% of the United States, energy consumption. most Of the residential heating is by direct use of natural gas. combustion of natural gas is a contributor to the overall air pollution,, especially CO and NO{sub x} in the urban areas. Another efficient method for domestic water and space heating is use of electric heat pumps, the most popular category of which uses air as its heat source. Electric heat pumps do not emit air pollutants at the point of use, but use electric power, which is a major contributor to air pollution at its point of generation from fossil fuels. It is the specific objective of this report to evaluate and compare the energy efficiency and source air pollutants of natural gas heaters and electric heat pumps used for domestic heating. Effect of replacing natural gas heaters with electric heat pumps on air pollutant emissions due to domestic heating in two urban areas and in California as a whole has also been evaluated. The analysis shows that with the present state of technology, electric heat pumps have higher heating efficiencies than natural gas heaters. Considering the current electricity generation mix in the US, electric heat pumps produce two to four times more NO{sub x}, much less CO, and comparable amount of CO{sub 2} per unit of useful heating energy compared to natural gas heaters. With California mix, electric heat pumps produce comparable NO{sub x} and much less CO and approximately 30% less CO{sub 2} per unit heat output. Replacement of natural gas heaters with electric heat pumps will slightly increase the overall NO{sub x}, and reduce CO and CO{sub 2} emissions in California. The effect of advanced technology power generation and heat pump heating has also been analyzed.

Ganji, A. [San Francisco State Univ., CA (United States). Div. of Engineering

1992-07-01T23:59:59.000Z

115

Air-Source Heat Pumps for Residential and Light Commercial Space Conditioning Applications  

Science Conference Proceedings (OSTI)

This technology brief provides the latest information on current and emerging air-source heat pump technologies for space heating and space cooling of residential and light commercial buildings. Air-source heat pumps provide important options that can reduce ownership costs while reducing noise and enhancing reliability and customer comfort. The tech brief also describes new air-source heat pumps with an important load shaping and demand response option.

2008-12-15T23:59:59.000Z

116

Heat Pumps | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Heat Pumps Heat Pumps Heat Pumps Geothermal heat pumps are expensive to install but pay for themselves over time in reduced heating and cooling costs. Learn more about how geothermal heat pumps heat and cool buildings by concentrating the naturally existing heat contained within the earth -- a clean, reliable, and renewable source of energy. In moderate climates, heat pumps can be an energy-efficient alternative to furnaces and air conditioners. Several types of heat pumps are available, including air-source; geothermal; ductless, mini-split; and absorption heat pumps. Learn more about the different options and how to use your heat pump efficiently to save money and energy at home. Featured Heat Pump Systems A heat pump can provide an alternative to using your air conditioner. | Photo courtesy of iStockPhoto/LordRunar.

117

Waste Heat Reduction and Recovery for Improving Furnace Efficiency, Productivity and Emissions Performance: A BestPractices Process Heating Technical Brief  

DOE Green Energy (OSTI)

This technical brief is a guide to help plant operators reduce waste heat losses associated with process heating equipment.

Not Available

2004-11-01T23:59:59.000Z

118

Weatherking Heating & Air conditioning | Open Energy Information  

Open Energy Info (EERE)

Page Page Edit with form History Facebook icon Twitter icon » Weatherking Heating & Air conditioning Jump to: navigation, search Name Weatherking Heating & Air conditioning Address 51 Meadow Lane Place Northfield, Ohio Zip 44067 Sector Buildings, Efficiency, Geothermal energy, Renewable Energy, Services Product Business and legal services; Energy audits/weatherization; Energy provider: power production;Energy provider: wholesale;Engineering/architectural/design;Installation;Investment/finances;Maintenance and repair; Retail product sales and distribution Phone number 330-908-0281 Website http://www.weatherking1.com Coordinates 41.3340869°, -81.530299° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":41.3340869,"lon":-81.530299,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

119

PERFORMANCE OF RESIDENTIAL AIR-TO-AIR HEAT EXCHANGERS: TEST METHODS AND RESULTS  

E-Print Network (OSTI)

Presenting Test Results Heat Exchanger Descriptions and Testof Residential Heat Exchangers Conclusions . . . . . . . .ventilation testing heat exchangers. system, a heat

Fisk, William J.

2013-01-01T23:59:59.000Z

120

Design and fabrication of a tin-sulfide annealing furnace  

E-Print Network (OSTI)

A furnace was designed and its heat transfer properties were analyzed for use in annealing thin-film tins-ulfide solar cells. Tin sulfide has been explored as an earth abundant solar cell material, and the furnace was ...

Lewis, Raymond, S.M. (Raymond A.) Massachusetts Institute of Technology

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "furnaces heat air" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Mean and Variability of Air-Sea Heat Fluxes in the Indian Ocean  

E-Print Network (OSTI)

-sea heat Fluxes) Project: blended product planned activity: daily, 1º-grid, mid 1950's ­ present currently available: daily, 1º-grid, 1988-2003 #12;OAFlux (Objectively Analyzed Air-sea Heat Fluxes) For the GlobalMean and Variability of Air-Sea Heat Fluxes in the Indian Ocean Lisan Yu Woods Hole Oceanographic

Yu, Lisan

122

Ferrosilicon smelting in a direct current furnace  

DOE Patents (OSTI)

The present invention is a process for smelting ferrosilicon alloy. The process comprises adding a carbon source and tailings comprising oxides of silicon and iron to a substantially closed furnace. Heat is supplied to the furnace by striking a direct current arc between a cathode electrode and an anode functional hearth. In a preferred embodiment of the present invention, the cathode electrode is hollow and feed to the substantially closed furnace is through the hollow electrode. 1 figure.

Dosaj, V.D.; May, J.B.

1992-12-29T23:59:59.000Z

123

Ductless Heat Pump Applications in Factory Built Housing  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Pump Applications in Pump Applications in Factory-built Housing Gaps and barriers addressed: - Retrofitting homes with existing electric forced-air furnace systems - Designing hybrid zonal heating systems for new homes Presented by Brady Peeks, Northwest Energy Works, Inc. Spring 2012 Residential Energy Efficiency Meeting, Austin, TX Ductless Heat Pump Retrofits in Manufactured Homes * Gaps and Barriers: - DHP interaction with existing ducted electric forced-air furnace system is unknown * Pacific Northwest utilities are monitoring a handful of mfd. homes to determine if savings differ from other housing types-no attempt to influence furnace interactions * Building America Partnership for Improving Residential

124

Energy Saving Technology of Thermal Regenerative Compressed Air Dryer by Regenerates Adsorbent with Residual Heat  

Science Conference Proceedings (OSTI)

According to the characteristic of the compressed air dryer located at the same place with the air compressor, for the large capacity thermal regenerative compressed air dryer that the absorbent is regenerated by an electric heater, this thesis puts ... Keywords: Compressed air dryer, Regeneration, Heater, Residual heat, Energy saving

Zhang Mingzhu; Zhou Zhili; Li Hongtao; Zhang Yongbo

2009-10-01T23:59:59.000Z

125

Radiative Heating Errors in Naturally Ventilated Air Temperature Measurements Made from Buoys*  

Science Conference Proceedings (OSTI)

Solar radiative heating errors in buoy-mounted, naturally ventilated air temperature sensors are examined. Data from sensors with multiplate radiation shields and collocated, fan-aspirated air temperature sensors from three buoy deployments ...

Steven P. Anderson; Mark F. Baumgartner

1998-02-01T23:59:59.000Z

126

DEVELOPMENT OF SOLAR DRIVEN ABSORPTION AIR CONDITIONERS AND HEAT PUMPS  

E-Print Network (OSTI)

the Annual DOE Active Solar Heating and Cooling Contractors'and Annual DOE Active Solar Heating and Cooling Contractors'refrigeration systems for solar active heating and cooling

Dao, K.

2013-01-01T23:59:59.000Z

127

Annual, Seasonal, and Interannual Variability of Air–Sea Heat Fluxes in the Indian Ocean  

Science Conference Proceedings (OSTI)

This study investigated the accuracy and physical representation of air–sea surface heat flux estimates for the Indian Ocean on annual, seasonal, and interannual time scales. Six heat flux products were analyzed, including the newly developed ...

Lisan Yu; Xiangze Jin; Robert A. Weller

2007-07-01T23:59:59.000Z

128

W-12: Determination of Interfacial Heat Transfer and Air-gap ...  

Science Conference Proceedings (OSTI)

It is predicted for the Nickel-based alloy when the air-gap is below 0.3mm heat conduction is the dominant heat transfer process; above 0.3mm radiation is the ...

129

An Air–Soil Layer Coupled Scheme for Computing Surface Heat Fluxes  

Science Conference Proceedings (OSTI)

An air–soil layer coupled scheme is developed to compute surface fluxes of sensible heat and latent heat from data collected at the Oklahoma Atmospheric Radiation Measurement–Cloud and Radiation Testbed (ARM–CART) stations. This new scheme ...

Qin Xu; Binbin Zhou; Stephen D. Burk; Edward H. Barker

1999-02-01T23:59:59.000Z

130

Heat transfer pathways in underfloor air distribution (UFAD) systems  

E-Print Network (OSTI)

the following heat transfer processes: conduction throughtudes of the major heat transfer processes in a typical room

Bauman, F.; Jin, H.; Webster, T.

2006-01-01T23:59:59.000Z

131

Mathematical model of a tube furnace for catalytic conversion of hydrocarbons  

Science Conference Proceedings (OSTI)

The tube furnace is a complex unit in which there are hundreds of reaction tubes and coils for heating the reaction mixture, gas, air, steam and water. Optimum design of such a unit can be done only with a mathematical model of it. A number of physicochemical processes occur in the reaction furnace: conversions of natural gas with heat supplied through the wall of the tube, combustion of fuel in the firebox, transfer of heat from the radiating walls or flame to the reaction tubes, heating of the vapor-gas mixture and other flows in the convective zone of the furnace. These processes are interrelated and there are some difficulties in writing a mathematical model for the furnace. We have adopted the following principle for construction of a model: individual processes are being modeled and the starting data for calculation of these are the results of modeling of other processes. Calculation is made by sequential approximations until material and thermal balances are observed for all processes, as is indicated on the calculation flowsheet. Thermal calculations were made by methods discussed in (2). Modeling the tube furnace on a computer makes it possible to determine its working characteristics and range of safe operation. Computer calculations permit the time required for design of furnaces to be reduced substantially and the quality of the design to be improved. Higher demands are beingmade on tube furnaces for catalytic conversion of natural gas both with regard to operating reliability and economy because of the sharp increase of the unit capacities of ammonia and methanol synthesis plants.

Stepanov, A.V.; Sul'zhik, N.I.; Kadygrob, L.A.; Gorlov, V.F.; Mishin, V.P.; Dugach, V.V.

1981-02-01T23:59:59.000Z

132

State of the Art of Air-source Heat Pump for Cold Regions  

E-Print Network (OSTI)

In this paper, research on air source heat pump systems for cold regions in recent years is first summarized and compared. These systems can be divided into three kinds: a single-stage compression heat pump, liquid/vapor injection heat pump, and a two-stage heat pump. Finally, our research with a two-stage compression variable frequency air source heat pump is presented. A two-control-model with the priority target as COP or heating capacity is advanced. The experimental results show that the COP of this heat pump system is over 2, the compressor discharge temperature under 120, and the heating capacity can meet the heating load needed when the condensing temperature is 50 and outdoor air temperature is over -18.

Tian, C.; Liang, N.

2006-01-01T23:59:59.000Z

133

Experimental investigation on the photovoltaic-thermal solar heat pump air-conditioning system on water-heating mode  

Science Conference Proceedings (OSTI)

An experimental study on operation performance of photovoltaic-thermal solar heat pump air-conditioning system was conducted in this paper. The experimental system of photovoltaic-thermal solar heat pump air-conditioning system was set up. The performance parameters such as the evaporation pressure, the condensation pressure and the coefficient of performance (COP) of heat pump air-conditioning system, the water temperature and receiving heat capacity in water heater, the photovoltaic (PV) module temperature and the photovoltaic efficiency were investigated. The experimental results show that the mean photovoltaic efficiency of photovoltaic-thermal (PV/T) solar heat pump air-conditioning system reaches 10.4%, and can improve 23.8% in comparison with that of the conventional photovoltaic module, the mean COP of heat pump air-conditioning system may attain 2.88 and the water temperature in water heater can increase to 42 C. These results indicate that the photovoltaic-thermal solar heat pump air-conditioning system has better performances and can stably work. (author)

Fang, Guiyin; Hu, Hainan; Liu, Xu [Department of Physics, Nanjing University, Nanjing 210093 (China)

2010-09-15T23:59:59.000Z

134

Performance analysis of a two-stage variable capacity air source heat pump and a horizontal loop coupled ground source heat pump system.  

E-Print Network (OSTI)

??The thermal performance of a new two-stage variable capacity air source heat pump (ASHP) and a horizontal ground loop ground source heat pump (GSHP) was… (more)

Safa, Amir Alizadeh

2012-01-01T23:59:59.000Z

135

Fluidized bed heat exchanger with water cooled air distributor and dust hopper  

DOE Patents (OSTI)

A fluidized bed heat exchanger is provided in which air is passed through a bed of particulate material containing fuel. A steam-water natural circulation system is provided for heat exchange and the housing of the heat exchanger has a water-wall type construction. Vertical in-bed heat exchange tubes are provided and the air distributor is water-cooled. A water-cooled dust hopper is provided in the housing to collect particulates from the combustion gases and separate the combustion zone from a volume within said housing in which convection heat exchange tubes are provided to extract heat from the exiting combustion gases.

Jukkola, Walfred W. (Westport, CT); Leon, Albert M. (Mamaroneck, NY); Van Dyk, Jr., Garritt C. (Bethel, CT); McCoy, Daniel E. (Williamsport, PA); Fisher, Barry L. (Montgomery, PA); Saiers, Timothy L. (Williamsport, PA); Karstetter, Marlin E. (Loganton, PA)

1981-11-24T23:59:59.000Z

136

Optimization of the Fin Heat Pipe for Ventilating and Air Conditioning with a Genetic Algorithm  

E-Print Network (OSTI)

This paper illustrates that use of a heat pipe as a heat-reclaiming device can significantly influence the air-conditioning system. It analyzes the heat transfer model of the uniform annular fin heat pipe under the condition of air conditioning. It establishes functions of the fin structure parameters such as height,spacing and thickness of the fin when the volume of fin is the smallest under unit temperature difference and unit quantity of heat. It uses a genetic algorithm to optimize the model of the uniform annular fin heat pipe. The calculation result shows that the method of genetic algorithm is effective.

Qian, J.; Sun, D.; Li, G.

2006-01-01T23:59:59.000Z

137

Numerical Investigation of Air-Side Heat Transfer and Pressure Drop in Circular Finned-Tube Heat Exchangers.  

E-Print Network (OSTI)

??A three-dimensional numerical study is performed to investigate the heat transfer and pressure drop performance on the air-side of circular finned tube bundles in cross… (more)

Mon, Mi Sandar

2003-01-01T23:59:59.000Z

138

Precision control of high temperature furnaces  

DOE Patents (OSTI)

It is an object of the present invention to provide precision control of high temperature furnaces. It is another object of the present invention to combine the power of two power supplies of greatly differing output capacities in a single furnace. This invention combines two power supplies to control a furnace. A main power supply heats the furnace in the traditional manner, while the power from the auxiliary supply is introduced as a current flow through charged particles existing due to ionized gas or thermionic emission. The main power supply provides the bulk heating power and the auxiliary supply provides a precise and fast power source such that the precision of the total power delivered to the furnace is improved. Further, this invention comprises a means for high speed measurement of temperature of the process by the method of measuring the amount of current flow in a deliberately induced charged particle current.

Pollock, G.G.

1994-12-31T23:59:59.000Z

139

GHPs Save Heating Cost and Improve Air Quality in Poultry Farm  

E-Print Network (OSTI)

: 40-50' wide, 400-500' length § Bird density: 1 square foot/bird, 20,000 birds1 GHPs Save Heating Cost and Improve Air Quality in Poultry Farm per house § Heating and cooling required § Intensive ventilation to maintain air

140

Factors Regulating the Air–Sea Heat Fluxes Regime over the Aegean Sea  

Science Conference Proceedings (OSTI)

The authors examine the impact of low-frequency atmospheric forcings on the air–sea heat fluxes over the Aegean Sea. The correlation between the air–sea heat flux components and three established [North Atlantic Oscillation (NAO), east Atlantic–...

Vassilis P. Papadopoulos; Aristides Bartzokas; Themistoklis Chronis; Dimitris Georgopoulos; George Ferentinos

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "furnaces heat air" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Furnaces and Boilers | Department of Energy  

NLE Websites -- All DOE Office Websites (Extended Search)

and Boilers June 24, 2012 - 4:56pm Addthis Upgrading to a high efficiency furnace or boiler is an effective way to save money on home heating. Upgrading to a high efficiency...

142

Advanced Variable Speed Air-Source Integrated Heat Pumps Research Project |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Advanced Variable Speed Air-Source Advanced Variable Speed Air-Source Integrated Heat Pumps Research Project Advanced Variable Speed Air-Source Integrated Heat Pumps Research Project The U.S. Department of Energy is currently conducting research into advanced variable speed air-source integrated heat pumps (AS-IHPs). Project Description This project seeks to develop AS-IHP products for the larger air-source system market. Development focuses on a fully variable capacity or variable speed AS-IHP option. Project Partners Research is being undertaken through a cooperative research and development agreement (CRADA) between the Department of Energy, Oak Ridge National Laboratory, and a CRADA partner. Project Goals The goal of this project is the development of a fully variable-speed version of an AS-IHP product that can provide heating, ventilation, and air

143

Heat transfer pathways in underfloor air distribution (UFAD) systems  

E-Print Network (OSTI)

permission. QC-06-053 Heat Transfer Pathways in Underfloorchange the dynamics of heat transfer within a room as wellchange the dynamics of heat transfer within a room as well

Bauman, F.; Jin, H.; Webster, T.

2006-01-01T23:59:59.000Z

144

High pressure furnace  

DOE Patents (OSTI)

A high temperature high pressure furnace has a hybrid partially externally heated construction. A metallic vessel fabricated from an alloy having a composition of at least 45% nickel, 15% chrome, and 10% tungsten is utilized (the preferred alloy including 55% nickel, 22% chrome, 14% tungsten, 2% molybdenum, 3% iron (maximum) and 5% cobalt (maximum). The disclosed alloy is fabricated into 11/4 or 2 inch, 32 mm or 50 mm bar stock and has a length of about 22 inches, 56 cm. This bar stock has an aperture formed therein to define a closed high temperature, high pressure oxygen chamber. The opposite and closed end of the vessel is provided with a small blind aperture into which a thermocouple can be inserted. The closed end of the vessel is inserted into an oven, preferably heated by standard nickel chrome electrical elements and having a heavily insulated exterior.

Morris, Donald E. (Kensington, CA)

1993-01-01T23:59:59.000Z

145

High pressure oxygen furnace  

DOE Patents (OSTI)

A high temperature high pressure oxygen furnace having a hybrid partially externally heated construction is disclosed. A metallic bar fabricated from an alloy having a composition of at least 45% nickel, 15% chrome, and 10% tungsten is utilized, the preferred alloy including 55% nickel, 22% chrome, 14% tungsten, 2% molybdenum, 3% iron (maximum) and 5% cobalt (maximum). The disclosed alloy is fabricated into 11/4 inch bar stock and has a length of about 17 inches. This bar stock is gun drilled for over 16 inches of its length with 0.400 inch aperture to define a closed high temperature, high pressure oxygen chamber. The opposite and closed end of the bar is provided with a small support aperture into which both a support and a thermocouple can be inserted. The closed end of the gun drilled bar is inserted into an oven, preferably heated by standard nickel chrome electrical elements and having a heavily insulated exterior. 5 figs.

Morris, D.E.

1992-07-14T23:59:59.000Z

146

High pressure oxygen furnace  

DOE Patents (OSTI)

A high temperature high pressure oxygen furnace having a hybrid partially externally heated construction is disclosed. A metallic bar fabricated from an alloy having a composition of at least 45% nickel, 15% chrome, and 10% tungsten is utilized (the preferred alloy including 55% nickel, 22% chrome, 14% tungsten, 2% molybdenum, 3% iron (maximum) and 5% cobalt (maximum). The disclosed alloy is fabricated into 11/4 inch bar stock and has a length of about 17 inches. This bar stock is gun drilled for over 16 inches of its length with 0.400 inch aperture to define a closed high temperature, high pressure oxygen chamber. The opposite and closed end of the bar is provided with a small support aperture into which both a support and a thermocouple can be inserted. The closed end of the gun drilled bar is inserted into an oven, preferably heated by standard nickel chrome electrical elements and having a heavily insulated exterior.

Morris, Donald E. (Kensington, CA)

1992-01-01T23:59:59.000Z

147

High pressure furnace  

DOE Patents (OSTI)

A high temperature high pressure furnace has a hybrid partially externally heated construction. A metallic vessel fabricated from an alloy having a composition of at least 45% nickel, 15% chrome, and 10% tungsten is utilized (the preferred alloy including 55% nickel, 22% chrome, 14% tungsten, 2% molybdenum, 3% iron (maximum) and 5% cobalt (maximum)). The disclosed alloy is fabricated into 11/4 or 2 inch, 32 mm or 50 mm bar stock and has a length of about 22 inches, 56 cm. This bar stock has an aperture formed therein to define a closed high temperature, high pressure oxygen chamber. The opposite and closed end of the vessel is provided with a small blind aperture into which a thermocouple can be inserted. The closed end of the vessel is inserted into an oven, preferably heated by standard nickel chrome electrical elements and having a heavily insulated exterior. 19 figures.

Morris, D.E.

1993-09-14T23:59:59.000Z

148

Induction Furnace Quench & Temper of Oil Field Tubular Goods  

Science Conference Proceedings (OSTI)

Because of the unique operating features of an induction furnace, each pipe is individually heat treated, producing more uniform properties than possible with ...

149

Breakthrough Furnace Can Cut Solar Industry Costs (Fact Sheet)  

SciTech Connect

A game-changing Optical Cavity Furnace (OCF), developed by NREL, uses optics to heat and purify solar cells at unmatched precision, while also boosting the cells' efficiency.

Not Available

2013-08-01T23:59:59.000Z

150

Residential Two-Stage Gas Furnaces - Do They Save Energy?  

E-Print Network (OSTI)

DOE and 2006 ASHRAE Test Procedures Furnace Controls Household Heating Requirementsprocedure (DOE 2004; Habart 2005) Heating Requirements areIn the DOE test procedure, the heating requirements of the

Lekov, Alex; Franco, Victor; Lutz, James

2006-01-01T23:59:59.000Z

151

Economic Analysis of a Waste Water Resource Heat Pump Air-Conditioning System in North China  

E-Print Network (OSTI)

This paper describes the situation of waste water resource in north China and the characteristics and styles of a waste water resource heat pump system, and analyzes the economic feasibility of a waste water resource heat pump air-conditioning system including investment, operating fee and pay-back time. The results show that waste water resource heat pump air-conditioning system has a low investment, low operating fee and short payback time.

Chen, H.; Li, D.; Dai, X.

2006-01-01T23:59:59.000Z

152

Heat Pump Systems | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Pump Systems Pump Systems Heat Pump Systems May 16, 2013 - 5:33pm Addthis A heat pump can provide an alternative to using your air conditioner. | Photo courtesy of iStockPhoto/LordRunar. A heat pump can provide an alternative to using your air conditioner. | Photo courtesy of iStockPhoto/LordRunar. What does this mean for me? Heat pumps can supply heat, cooling, and hot water. Your climate and site will determine the type of heat pump most appropriate for your home. For climates with moderate heating and cooling needs, heat pumps offer an energy-efficient alternative to furnaces and air conditioners. Like your refrigerator, heat pumps use electricity to move heat from a cool space to a warm space, making the cool space cooler and the warm space warmer. During the heating season, heat pumps move heat from the cool outdoors into

153

Fresh Way to Cut Combustion, Crop and Air Heating Costs Avoids Million BTU Purchases: Inventions and Innovation Combustion Success Story  

DOE Green Energy (OSTI)

Success story written for the Inventions and Innovation Program about a new space heating method that uses solar energy to heat incoming combustion, crop, and ventilation air.

Wogsland, J.

2001-01-17T23:59:59.000Z

154

Atmospheric Forcing of the Winter Air–Sea Heat Fluxes over the Northern Red Sea  

Science Conference Proceedings (OSTI)

The influence of the atmospheric circulation on the winter air–sea heat fluxes over the northern Red Sea is investigated during the period 1985–2011. The analysis based on daily heat flux values reveals that most of the net surface heat exchange ...

Vassilis P. Papadopoulos; Yasser Abualnaja; Simon A. Josey; Amy Bower; Dionysios E. Raitsos; Harilaos Kontoyiannis; Ibrahim Hoteit

2013-03-01T23:59:59.000Z

155

Applied heat transfer  

Science Conference Proceedings (OSTI)

Heat transfer principles are discussed with emphasis on the practical aspects of the problems. Correlations for heat transfer and pressure drop from several worldwide sources for flow inside and outside of tubes, including finned tubes are presented, along with design and performance calculations of heat exchangers economizers, air heaters, condensers, waste-heat boilers, fired heaters, superheaters, and boiler furnaces. Vibration analysis for tube bundles and heat exchangers are also discussed, as are estimating gas-mixture properties at atmospheric and elevated pressures and life-cycle costing techniques. (JMT)

Ganapathy, V.

1982-01-01T23:59:59.000Z

156

Vehicle cabin cooling system for capturing and exhausting heated boundary layer air from inner surfaces of solar heated windows  

DOE Patents (OSTI)

The cabin cooling system includes a cooling duct positioned proximate and above upper edges of one or more windows of a vehicle to exhaust hot air as the air is heated by inner surfaces of the windows and forms thin boundary layers of heated air adjacent the heated windows. The cabin cooling system includes at least one fan to draw the hot air into the cooling duct at a flow rate that captures the hot air in the boundary layer without capturing a significant portion of the cooler cabin interior air and to discharge the hot air at a point outside the vehicle cabin, such as the vehicle trunk. In a preferred embodiment, the cooling duct has a cross-sectional area that gradually increases from a distal point to a proximal point to the fan inlet to develop a substantially uniform pressure drop along the length of the cooling duct. Correspondingly, this cross-sectional configuration develops a uniform suction pressure and uniform flow rate at the upper edge of the window to capture the hot air in the boundary layer adjacent each window.

Farrington, Robert B. (Golden, CO); Anderson, Ren (Broomfield, CO)

2001-01-01T23:59:59.000Z

157

Air flow in a high aspect ratio heat sink  

E-Print Network (OSTI)

The increasing heat output of modern electronics requires concomitant advances in heat sinking technology: reductions in thermal resistance and required pumping power are necessary. This research covers the development of ...

Allison, Jonathan Michael

2010-01-01T23:59:59.000Z

158

Heat transfer pathways in underfloor air distribution (UFAD) systems  

E-Print Network (OSTI)

displacement venti- lation. ASHRAE Transactions 105(1):298–309. ASHRAE Transactionsunderfloor air supply plenums. ASHRAE Trans- actions 112(2).

Bauman, F.; Jin, H.; Webster, T.

2006-01-01T23:59:59.000Z

159

Furnaces and Energy  

Science Conference Proceedings (OSTI)

Cast Shop for Aluminum Production: Furnaces and Energy ... Computational Analysis of Thermal Process of a Regenerative Aluminum Melting Furnace: Jimin ... and the appearance of innovative and competing stirrer systems in the market.

160

Air emissions from residential heating: The wood heating option put into environmental perspective. Report for June 1997--July 1998  

SciTech Connect

The paper compares the national scale (rather than local) air quality impacts of the various residential space heating options. Specifically, it compares the relative contributions of the space heating options to fine particulate emissions, greenhouse gas emissions, and acid precipitation impacts. The major space heating energy options are natural gas, fuel oil, kerosene, liquefied petroleum gas (LPG), electricity, coal, and wood. Residential wood combustion (RWC) meets 9% of the Nation`s space heating energy needs and utilizes a renewable resource. Wood is burned regularly in about 30 million homes. Residential wood combustion is often perceived as environmentally dirty due to emissions from older wood burners.

Houck, J.E.; Tiegs, P.E.; McCrillis, R.C.; Keithley, C.; Crouch, J.

1998-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "furnaces heat air" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Anode Baking Furnace Operation  

Science Conference Proceedings (OSTI)

The course is directed toward plant managers, anode area managers, process engineers, technical managers, and baking furnace ... ENERGY MANAGEMENT.

162

Preliminary design package for residential heating/cooling system--Rankine air conditioner redesign  

DOE Green Energy (OSTI)

This report contains a summary of the preliminary redesign and development of a marketable single-family heating and cooling system. The objectives discussed are the interim design and schedule status of the Residential (3-ton) redesign, problem areas and solutions, and the definition of plans for future design and development activities. The proposed system for a single-family residential heating and cooling system is a single-loop, solar-assisted, hydronic-to-warm-air heating subsystem with solar-assisted domestic water heating and a Rankine-driven expansion air-conditioning subsystem.

Not Available

1978-12-01T23:59:59.000Z

163

DOE Requires Manufacturers to Halt Sales of Heat Pumps and Air Conditioners  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Manufacturers to Halt Sales of Heat Pumps and Air Manufacturers to Halt Sales of Heat Pumps and Air Conditioners Violating Minimum Appliance Standards DOE Requires Manufacturers to Halt Sales of Heat Pumps and Air Conditioners Violating Minimum Appliance Standards June 3, 2010 - 2:17pm Addthis Today, the Department of Energy announced that three manufacturers -- Aspen Manufacturing, Inc., Summit Manufacturing, and Advanced Distributor Products -- must stop distributing 61 heat pump models and 1 air conditioner model that DOE has determined do not comply with federal energy conservation standards. The manufacturers also must notify all of their customers that have been sold noncompliant units. The Department determined that these models were noncompliant based on certification information submitted to DOE for these manufacturers.

164

Covered Product Category: Residential Air-Source Heat Pumps | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Residential Air-Source Heat Pumps Residential Air-Source Heat Pumps Covered Product Category: Residential Air-Source Heat Pumps October 7, 2013 - 10:35am Addthis ENERGY STAR logo FEMP provides acquisition guidance across a variety of product categories, including residential air-source heat pumps (ASHPs), which are an ENERGY STAR®-qualified product category. Federal laws and executive orders mandate that agencies meet these efficiency requirements in all procurement and acquisition actions that are not specifically exempted by law. Most manufacturers display the ENERGY STAR label on complying models. For a model not displaying this label, check the manufacturer's literature to determine if it meets the efficiency requirements outlined by ENERGY STAR. Performance Requirements for Federal Purchases

165

DOE Requires Manufacturers to Halt Sales of Heat Pumps and Air Conditioners  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Requires Manufacturers to Halt Sales of Heat Pumps and Air Requires Manufacturers to Halt Sales of Heat Pumps and Air Conditioners Violating Minimum Appliance Standards DOE Requires Manufacturers to Halt Sales of Heat Pumps and Air Conditioners Violating Minimum Appliance Standards June 3, 2010 - 2:17pm Addthis Today, the Department of Energy announced that three manufacturers -- Aspen Manufacturing, Inc., Summit Manufacturing, and Advanced Distributor Products -- must stop distributing 61 heat pump models and 1 air conditioner model that DOE has determined do not comply with federal energy conservation standards. The manufacturers also must notify all of their customers that have been sold noncompliant units. The Department determined that these models were noncompliant based on certification information submitted to DOE for these manufacturers.

166

Covered Product Category: Residential Air-Source Heat Pumps | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Air-Source Heat Pumps Air-Source Heat Pumps Covered Product Category: Residential Air-Source Heat Pumps October 7, 2013 - 10:35am Addthis ENERGY STAR logo FEMP provides acquisition guidance across a variety of product categories, including residential air-source heat pumps (ASHPs), which are an ENERGY STAR®-qualified product category. Federal laws and executive orders mandate that agencies meet these efficiency requirements in all procurement and acquisition actions that are not specifically exempted by law. Most manufacturers display the ENERGY STAR label on complying models. For a model not displaying this label, check the manufacturer's literature to determine if it meets the efficiency requirements outlined by ENERGY STAR. Performance Requirements for Federal Purchases For the most up-to-date efficiency levels required by ENERGY STAR, look for

167

An Analytical Model of Heating Errors in Marine Air Temperatures from Ships  

Science Conference Proceedings (OSTI)

Marine air temperature reports from ships can contain significant biases due to the solar heating of the instruments and their surroundings. However, there have been very few attempts to derive corrections. The biases can reverse the sign of the ...

David I. Berry; Elizabeth C. Kent; Peter K. Taylor

2004-08-01T23:59:59.000Z

168

HEAT PUMP AND AIR CONDITIONING SYSTEM ANALYSIS BASED ON VARIABLE SPEED COMPRESSOR.  

E-Print Network (OSTI)

??Mechanical Engineering M.S.E. Experiments were carried out to investigate the effect of ambient air temperatures on the heat pump performance using a variable speed compressor.… (more)

Zhang, Hao

2010-01-01T23:59:59.000Z

169

DOE Requires Manufacturers to Halt Sales of Heat Pumps and Air Conditioners  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Requires Manufacturers to Halt Sales of Heat Pumps and Air Requires Manufacturers to Halt Sales of Heat Pumps and Air Conditioners Violating Minimum Appliance Standards DOE Requires Manufacturers to Halt Sales of Heat Pumps and Air Conditioners Violating Minimum Appliance Standards June 3, 2010 - 12:00am Addthis Washington, DC - Today, the Department of Energy announced that three manufacturers -- Aspen Manufacturing, Inc., Summit Manufacturing, and Advanced Distributor Products -- must stop distributing 61 heat pump models and 1 air conditioner model that DOE has determined do not comply with federal energy conservation standards. The manufacturers also must notify all of their customers that have been sold noncompliant units. The Department determined that these models were noncompliant based on certification information submitted to DOE for these manufacturers.

170

The Effects of Small-Scale Turbulence on Air–Sea Heat Flux  

Science Conference Proceedings (OSTI)

The air–sea exchange of heat is mainly controlled by the molecular diffusive layer adjacent to the surface. With an order of magnitude difference between the kinematic viscosity and thermal diffusivity of water, the thermal sublayer is embedded ...

Fabrice Veron; W. Kendall Melville; Luc Lenain

2011-01-01T23:59:59.000Z

171

Intercomparisons of Air–Sea Heat Fluxes over the Southern Ocean  

Science Conference Proceedings (OSTI)

Consistency and discrepancy of air–sea latent and sensible heat fluxes (LHF and SHF, respectively) in the Southern Ocean for current-day flux products are analyzed from climatology and interannual-to-decadal variability perspectives. Five flux ...

Jiping Liu; Tingyin Xiao; Liqi Chen

2011-02-01T23:59:59.000Z

172

Air-Conditioning, Heating, and Refrigeration Institute (AHRI) Regulatory Burden RFI  

Energy.gov (U.S. Department of Energy (DOE))

These comments are submitted by the Air-Conditioning, Heating, and Refrigeration Institute (AHRI) in response to the U.S. Department of Energy’s (DOE) notice in the August 8, 2012 Federal Register...

173

Inverse Analysis Adjustment of the SOC Air–Sea Flux Climatology Using Ocean Heat Transport Constraints  

Science Conference Proceedings (OSTI)

Results are presented from a linear inverse analysis of the Southampton Oceanography Centre (SOC) air–sea flux climatology using 10 hydrographic ocean heat transport constraints distributed throughout the Atlantic and North Pacific Oceans. A ...

Jeremy P. Grist; Simon A. Josey

2003-10-01T23:59:59.000Z

174

Parameterizations of Sea-Spray Impact on the Air–Sea Momentum and Heat Fluxes  

Science Conference Proceedings (OSTI)

This paper focuses on parameterizing the effect of sea spray at hurricane-strength winds on the momentum and heat fluxes in weather prediction models using the Monin–Obukhov similarity theory (a common framework for the parameterizations of air–...

J.-W. Bao; C. W. Fairall; S. A. Michelson; L. Bianco

2011-12-01T23:59:59.000Z

175

Improved Modeling of Residential Air Conditioners and Heat Pumps for Energy Calculations  

SciTech Connect

This report presents improved air conditioner and heat pump modeling methods in the context of whole-building simulation tools, with the goal of enabling more accurate evaluation of cost effective equipment upgrade opportunities and efficiency improvements in residential buildings.

Cutler, D.; Winkler, J.; Kruis, N.; Christensen, C.; Brendemuehl, M.

2013-01-01T23:59:59.000Z

176

Measuring important parameters for air-sea heat exchange Christoph S. Garbeab, Uwe Schimpfab and Bernd Jhneab  

E-Print Network (OSTI)

Measuring important parameters for air-sea heat exchange Christoph S. Garbeab, Uwe Schimpfab Exchange, Heat flux, Digital Image Processing, Surface Renewal 1. INTRODUCTION Thermographic techniques-water heat exchange. A driving force in air sea interactions is the net sea surface heat flux. It is a vital

Garbe, Christoph S.

177

HVAC Technology Report: A Review of Heating, Ventilation and Air Conditioning Technology and Markets  

Science Conference Proceedings (OSTI)

For many of us, roughly 95 percent of our time is spent indoors. To enable humans to spend this much time inside, mechanical equipment is necessary to provide space conditioning to control the temperature (heating and cooling), ventilation, humidity, and indoor air quality. This report introduces the heating, ventilation, and air-conditioning (HVAC) industry to EPRI member utility employees. The document describes the most common technologies and applications and provides an overview of industry statisti...

2000-12-14T23:59:59.000Z

178

RESIDENTIAL AIR CONDITIONER FINNED-TUBE CONDENSER HEAT EXCHANGER OPTIMIZATION  

E-Print Network (OSTI)

With the upcoming ban on the production of R-22 in 2010, residential air-conditioning equipment will need to be redesigned with a more environmentally benign working fluid. R-410a is a strong candidate for replacing R-22. A model of an air-conditioning system with a focus on the finned-tube condenser design details using R-410a as the working fluid is developed. An optimization algorithm is implemented to find the optimal condenser design with various constraints for an efficiency figure of merit. The software developed is appropriate for engineering design use in the air-conditioning industry.

Susan W. Stewart; Kristinn A. Aspelund; Monifa F. Wright; Emma M. Sadler; Sam V. Shelton, Ph.D.

2002-01-01T23:59:59.000Z

179

Commissioning Tools for Heating/Cooling System in Residence - Verification of Floor Heating System and Room Air Conditioning System Performance  

E-Print Network (OSTI)

Tools of evaluating the performance of floor heating and room air conditioner are examined as a commissioning tool. Simple method is needed to check these performance while in use by residents, because evaluation currently requires significant time and effort. Therefore, this paper proposes a) two methods of evaluating the floor heating efficiency from the room / crawl space temperature and the energy consumption and b) method of evaluating COP of the room air conditioner from the data measured at the external unit. Case studies in which these tools were applied to actual residences are presented to demonstrate their effectiveness.

Miura, H.; Hokoi, S.; Iwamae, A.; Umeno, T.; Kondo, S.

2004-01-01T23:59:59.000Z

180

Influence of air conditioning management on heat island in Paris air street temperatures  

E-Print Network (OSTI)

spatial cartography of air- cooled chillers and cooling towers in the city of Paris and surroundings have); secondly the actual situation including individual air dry coolers, wet cooling towers and an urban cooling the air cooling demand. Results of a meso-scale meteorological model (MESO-NH), coupled to an urban energy

Note: This page contains sample records for the topic "furnaces heat air" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Determining the quality and quantity of heat produced by proton exchange membrane fuel cells with application to air-cooled stacks for combined heat and power  

E-Print Network (OSTI)

Determining the quality and quantity of heat produced by proton exchange membrane fuel cells Determining the quality and quantity of heat produced by proton exchange membrane fuel cells with application, the coolant is pumped to a heat recovery system. A water-to-air heat exchange system or water-to-water heat

Victoria, University of

182

Tips: Air Ducts | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Air Ducts Air Ducts Tips: Air Ducts June 24, 2013 - 7:23pm Addthis Air Ducts: Out of Sight, Out of Mind. The unsealed ducts in your attic and crawlspaces lose air, and uninsulated ducts lose heat -- wasting energy and money. Air Ducts: Out of Sight, Out of Mind. The unsealed ducts in your attic and crawlspaces lose air, and uninsulated ducts lose heat -- wasting energy and money. Your air ducts are one of the most important systems in your home, and if the ducts are poorly sealed or insulated they are likely contributing to higher energy bills. Your home's duct system is a branching network of tubes in the walls, floors, and ceilings; it carries the air from your home's furnace and central air conditioner to each room. Ducts are made of sheet metal, fiberglass, or other materials.

183

Register Closing Effects on Forced Air Heating System Performance  

E-Print Network (OSTI)

Air Handler Power - Climate Zone 16 48 hr avg 24 hr avg FarAverage Gas Power - Climate Zone 16 48 hr avg 24 hr avg NearAverage Gas Power - Climate Zone 16 48 hr avg Near Registers

Walker, Iain S.

2003-01-01T23:59:59.000Z

184

Energy Efficient Process Heating: Insulation and Thermal Mass Kevin Carpenter and Kelly Kissock  

E-Print Network (OSTI)

1 Energy Efficient Process Heating: Insulation and Thermal Mass Kevin Carpenter and Kelly Kissock tanks and reducing thermal mass. A companion paper, Energy Efficiency Process Heating: Managing Air Flow of the oven/furnace. Reducing the quantity of energy lost to thermal mass in a process heating system saves

Kissock, Kelly

185

Vertical feed stick wood fuel burning furnace system  

DOE Patents (OSTI)

A stove or furnace for efficient combustion of wood fuel includes a vertical feed combustion chamber (15) for receiving and supporting wood fuel in a vertical attitude or stack. A major upper portion of the combustion chamber column comprises a water jacket (14) for coupling to a source of water or heat transfer fluid for convection circulation of the fluid. The locus (31) of wood fuel combustion is thereby confined to the refractory base of the combustion chamber. A flue gas propagation delay channel (34) extending laterally from the base of the chamber affords delayed travel time in a high temperature refractory environment sufficient to assure substantially complete combustion of the gaseous products of wood burning with forced air prior to extraction of heat in heat exchanger (16). Induced draft draws the fuel gas and air mixture laterally through the combustion chamber and refractory high temperature zone to the heat exchanger and flue. Also included are active sources of forced air and induced draft, multiple circuit couplings for the recovered heat, and construction features in the refractory material substructure and metal component superstructure.

Hill, Richard C. (Orono, ME)

1982-01-01T23:59:59.000Z

186

Estimating Monthly Averaged Air-Sea Transfers of Heat and Momentum Using the Bulk Aerodynamic Method  

Science Conference Proceedings (OSTI)

Air-sea transfers of sensible heat, latent heat and momentum are computed from 25 years of middle-latitude and subtropical ocean weather ship data in the North Atlantic and North Pacific using the bulk aerodynamic method. The results show that ...

Steven K. Esbensen; Richard W. Reynolds

1981-04-01T23:59:59.000Z

187

Opportunities for Saving Energy and Improving Air Quality in Urban Heat Islands  

SciTech Connect

World energy use is the main contributor to atmospheric CO2. In 2002, about 7.0 giga metric tons of carbon (GtC) were emitted internationally by combustion of gas, liquid, and solid fuels (CDIAC, 2006), 2 to 5 times the amount contributed by deforestation (Brown et al., 1988). The share of atmospheric carbon emissions for the United States from fossil fuel combustion was 1.6 GtC. Increasing use of fossil fuel and deforestation together have raised atmospheric CO{sub 2} concentration some 25% over the last 150 years. According to global climate models and preliminary measurements, these changes in the composition of the atmosphere have already begun raising the Earth's average temperature. If current energy trends continue, these changes could drastically alter the Earth's temperature, with unknown but potentially catastrophic physical and political consequences. During the last three decades, increased energy awareness has led to conservation efforts and leveling of energy consumption in the industrialized countries. An important byproduct of this reduced energy use is the lowering of CO{sub 2} emissions. Of all electricity generated in the United States, about one-sixth is used to air-condition buildings. The air-conditioning use is about 400 tera-watt-hours (TWh), equivalent to about 80 million metric tons of carbon (MtC) emissions, and translating to about $40 billion (B) per year. Of this $40 B/year, about half is used in cities that have pronounced 'heat islands'. The contribution of the urban heat island to the air-conditioning demand has increased over the last 40 years and it is currently at about 10%. Metropolitan areas in the United States (e.g., Los Angeles, Phoenix, Houston, Atlanta, and New York City) have typically pronounced heat islands that warrant special attention by anyone concerned with broad-scale energy efficiency (HIG, 2006). The ambient air is primarily heated through three processes: direct absorption of solar radiation, convection of heat from hot surfaces, and man-made heat (exhaust from cars, buildings, etc.). Air is fairly transparent to light--the direct absorption of solar radiation in atmospheric air only raises the air temperature by a small amount. Typically about 90% of solar radiation reaches the Earth's surface and then is either absorbed or reflected. The absorbed radiation on the surface increases the surface temperature. And in turn the hot surfaces heat the air. This convective heating is responsible for the majority of the diurnal temperature range. The contribution of man-made heat (e.g., air conditioning, cars) is very small, compared to the heating of air by hot surfaces, except for the downtown high-rise areas.

Akbari, Hashem

2007-07-01T23:59:59.000Z

188

Computer Measurement and Automation System for Gas-fired Heating...  

NLE Websites -- All DOE Office Websites (Extended Search)

Computer Measurement and Automation System for Gas-fired Heating Furnace Title Computer Measurement and Automation System for Gas-fired Heating Furnace Publication Type Journal...

189

Characterization of crushed glass as a transpired air heating solar collector material  

DOE Green Energy (OSTI)

The use of crushed glass matrices as the heat-absorbing media in air heating solar collectors is investigated. An experimantal program was undertaken to characterize the most likely candidate glass types and sizes by measuring pressure drops, optical extinction coefficients, and volumetric heat transfer coefficients. Bed efficiencies were also measured and found to be similar to those expected for screen matrices unless critical amounts of clear glass were used as a top layer, which results in lower efficiency.

Collier, R.K.

1979-01-01T23:59:59.000Z

190

Heat transfer and pressure drop measurements in an air/molten salt direct-contact heat exchanger  

SciTech Connect

This paper presents a comparison of experimental data with a recently published model of heat exchange in irrigated packed beds. Heat transfer and pressure drop were measured in a 150 mm (ID) column with a 610-mm bed of metal Pall rings. Molten nitrate salt and preheated air were the working fluids with a salt inlet temperature of approximately 440{degree}C and air inlet temperatures of approximately 230{degree}C. A comparison between the experimental data and the heat transfer model is made on the basis of heat transfer from the salt. For the range of air and salt flow rates tested, 0.3 to 1.2 kg/m{sup 2} s air flow and 6 to 18 kg/m{sup 2} s salt flow, the data agree with the model within 22% standard deviation. In addition, a model for the column pressure drop was validated, agreeing with the experimental data within 18% standard deviation over the range of column pressure drop from 40 to 1250 Pa/m. 25 refs., 7 figs., 2 tabs.

Bohn, M.S.

1988-11-01T23:59:59.000Z

191

Investigation Of Synergistic NOx Reduction From Cofiring And Air Staged Combustion Of Coal And Low Ash Dairy Biomass In A 30 Kilowatt Low NOx Furnace  

E-Print Network (OSTI)

Alternate, cost effective disposal methods must be developed for reducing phosphorous and nitrogen loading from land application of animal waste. Cofiring coal with animal waste, termed dairy biomass (DB), is the proposed thermo-chemical method to address this concern. DB is evaluated as a cofired fuel with Wyoming Powder River Basin (PRB) sub-bituminous coal in a small-scale 29 kW_(t) low NO_(x) burner (LNB) facility. Fuel properties, of PRB and DB revealed the following: a higher heating value of 29590 kJ/kg for dry ash free (DAF) coal and 21450 kJ/kg for DAF DB. A new method called Respiratory Quotient (RQ), defined as ratio of carbon dioxide moles to oxygen moles consumed in combustion, used widely in biology, was recently introduced to engineering literature to rank global warming potential (GWP) of fuels. A higher RQ means higher CO_(2) emission and higher GWP. PRB had an RQ of 0.90 and DB had an RQ of 0.92. For comparison purposes, methane has an RQ of 0.50. For unknown fuel composition, gas analyses can be adapted to estimate RQ values. The LNB was modified and cofiring experiments were performed at various equivalence ratios (phi) with pure coal and blends of PRB-DB. Standard emissions from solid fuel combustion were measured; then NO_(x) on a heat basis (g/GJ), fuel burnt fraction, and fuel nitrogen conversion percentage were estimated. The gas analyses yielded burnt fraction ranging from 89% to 100% and confirmed an RQ of 0.90 to 0.94, which is almost the same as the RQ based on fuel composition. At the 0.90 equivalence ratio, unstaged pure coal produced 653 ppm (377 g/GJ) of NOx. At the same equivalence ratio, a 90-10 PRB:LADB blended fuel produced 687 ppm (397 g/GJ) of NO_(x). By staging 20% of the total combustion air as tertiary air (which raised the equivalence ratio of the main burner to 1.12), NO_(x) was reduced to 545 ppm (304 g/GJ) for the 90-10 blended fuel. Analysis of variance showed that variances were statistically significant because of real differences between the independent variables (equivalence ratio, percent LADB in the fuel, and staging intensity).

Lawrence, Benjamin Daniel

2013-08-01T23:59:59.000Z

192

Heating Alloys  

Science Conference Proceedings (OSTI)

...are used in many varied applications--from small household appliances to large industrial process heating systems and furnaces. In appliances or industrial process heating, the heating elements are usually either open

193

Multiple hearth furnace for reducing iron oxide  

SciTech Connect

A multiple moving hearth furnace (10) having a furnace housing (11) with at least two moving hearths (20) positioned laterally within the furnace housing, the hearths moving in opposite directions and each moving hearth (20) capable of being charged with at least one layer of iron oxide and carbon bearing material at one end, and being capable of discharging reduced material at the other end. A heat insulating partition (92) is positioned between adjacent moving hearths of at least portions of the conversion zones (13), and is capable of communicating gases between the atmospheres of the conversion zones of adjacent moving hearths. A drying/preheat zone (12), a conversion zone (13), and optionally a cooling zone (15) are sequentially positioned along each moving hearth (30) in the furnace housing (11).

Brandon, Mark M. (Charlotte, NC); True, Bradford G. (Charlotte, NC)

2012-03-13T23:59:59.000Z

194

Direct-contact air/molten salt heat exchange for solar-thermal systems  

DOE Green Energy (OSTI)

Heat exchangers employing direct contact between molten draw salt and air were studied for use in solar industrial process heat (IPH) systems. Direct-contact systems consisting of a fin-tube preheater and a spray or packed column were compared to conventional heat exchangers. Direct contact reduced the IPH system cost by 5% to 10%. The direct-contact heat exchangers cost only 15% to 30% as much as comparable conventional exchangers. However, the rate of salt degradation by CO/sup 2/ and H/sub 2/O must be determined to see if it is acceptable.

Wright, J.D.; d'Agincourt, C.

1982-05-01T23:59:59.000Z

195

Experimental study on corrugated cross-flow air-cooled plate heat exchangers  

SciTech Connect

Experimental study on cross-flow air-cooled plate heat exchangers (PHEs) was performed. The two prototype PHEs were manufactured in a stack of single-wave plates and double-wave plates in parallel. Cooling air flows through the PHEs in a crosswise direction against internal cooling water. The heat exchanger aims to substitute open-loop cooling towers with closed-loop water circulation, which guarantees cleanliness and compactness. In this study, the prototype PHEs were tested in a laboratory scale experiments. From the tests, double-wave PHE shows approximately 50% enhanced heat transfer performance compared to single-wave PHE. However, double-wave PHE costs 30% additional pressure drop. For commercialization, a wide channel design for air flow would be essential for reliable performance. (author)

Kim, Minsung; Baik, Young-Jin; Park, Seong-Ryong; Ra, Ho-Sang [Solar Thermal and Geothermal Research Center, Korea Institute of Energy Research, Daejeon 305-343 (Korea); Lim, Hyug [Research and Development Center, LHE Co., Ltd., Gimhae 621-874 (Korea)

2010-11-15T23:59:59.000Z

196

Method and apparatus for operating a self-starting air heating system  

DOE Patents (OSTI)

A self-starting, fuel fired, air heating system including a fuel burner fired vapor generator, a turbine, and a condenser connected in a closed circuit such that the vapor output from the vapor generator is conducted to the turbine and then to the condenser where it is condensed for return to the vapor generator. The turbine drives an air blower which passes air over the condenser for cooling the condenser and heating the air. Also, a condensate pump is driven by the turbine. The disclosure is particularly concerned with a method and apparatus which on start-up prevents the vapor generator's vapor output from being conducted to the turbine until a predetermined pressure differential has been achieved. However, after the vapor flow is once permitted, it cannot again be prevented until after the fuel burner has been shut off and restarted.

Heinrich, Charles E. (Mentor, OH)

1983-12-06T23:59:59.000Z

197

Seasonal Energy Efficiency Ratio (SEER) Investigation for Residential and Small Commercial Air-Source Heat Pumps  

Science Conference Proceedings (OSTI)

Electric utilities frequently use the seasonal energy efficiency ratio (SEER) in air conditioning–based incentive programs to categorize energy efficiency and to quantify financial value. For residential and small commercial unitary air conditioners and heat pumps, SEER is determined by the procedures outlined in ANSI/AHRI Standard 210/240. Within Standard 210/240, SEER is calculated based on laboratory test results and equations that follow specific assumptions regarding indoor temperature, ...

2012-12-21T23:59:59.000Z

198

Vertical two chamber reaction furnace  

DOE Patents (OSTI)

A vertical two chamber reaction furnace is disclosed. The furnace comprises a lower chamber having an independently operable first heating means for heating the lower chamber and a gas inlet means for admitting a gas to create an ambient atmosphere, and an upper chamber disposed above the lower chamber and having an independently operable second heating means for heating the upper chamber. Disposed between the lower chamber and the upper chamber is a vapor permeable diffusion partition. The upper chamber has a conveyor means for conveying a reactant there through. Of particular importance is the thallinating of long-length thallium-barium-calcium copper oxide (TBCCO) or barium-calcium-copper oxide (BCCO) precursor tapes or wires conveyed through the upper chamber to thereby effectuate the deposition of vaporized thallium (being so vaporized as the first reactant in the lower chamber at a temperature between about 700 and 800 C) on TBCCO or BCCO tape or wire (the second reactant) at its simultaneous annealing temperature in the upper chamber of about 800 to 950 C to thereby replace thallium oxide lost from TBCCO tape or wire because of the high annealing temperature or to deposit thallium on BCCO tape or wire. Continuously moving the tape or wire provides a single-step process that effectuates production of long-length TBCCO superconducting product. 2 figs.

Blaugher, R.D.

1999-03-16T23:59:59.000Z

199

CHAMPS-Multizone-A Combined Heat, Air, Moisture and Pollutant Simulation  

NLE Websites -- All DOE Office Websites (Extended Search)

CHAMPS-Multizone-A Combined Heat, Air, Moisture and Pollutant Simulation CHAMPS-Multizone-A Combined Heat, Air, Moisture and Pollutant Simulation Environment for Whole-building Performance Analysis Title CHAMPS-Multizone-A Combined Heat, Air, Moisture and Pollutant Simulation Environment for Whole-building Performance Analysis Publication Type Journal Article Year of Publication 2012 Authors Zhang, J. S., Wei Feng, John Grunewald, Andreas Nicolai, and Carey Zhang Journal HVAC&R Research Volume 18 Issue 1-2 Abstract A computer simulation tool, named "CHAMPS-Multizone" is introduced in this paper for analyzing bothenergy and IAQ performance of buildings. The simulation model accounts for the dynamic effects ofoutdoor climate conditions (solar radiation, wind speed and direction, and contaminant concentrations),building materials and envelope system design, multizone air and contaminant flows in buildings,internal heat and pollutant sources, and operation of the building HVAC systems on the buildingperformance. It enables combined analysis of building energy efficiency and indoor air quality. Themodel also has the ability to input building geometry data and HVAC system operation relatedinformation from software such as SketchUp and DesignBuilder via IDF file format. A "bridge" to accessstatic and dynamic building data stored in a "virtual building" database is also developed, allowingconvenient input of initial and boundary conditions for the simulation, and for comparisons between thepredicted and measured results. This paper summarizes the mathematical models, adoptedassumptions, methods of implementation, and verification and validation results. The needs andchallenges for further development are also discussed

200

Biological Kraft Chemical Recycle for Augmentation of Recovery Furnace Capacity  

DOE Green Energy (OSTI)

The chemicals used in pulping of wood by the kraft process are recycled in the mill in the recovery furnace, which oxidizes organics while simultaneously reducing sulfate to sulfide. The recovery furnace is central to the economical operation of kraft pulp mills, but it also causes problems. The total pulp production of many mills is limited by the recovery furnace capacity, which cannot easily be increased. The furnace is one of the largest sources of air pollution (as reduced sulfur compounds) in the kraft pulp mill.

Stuart E. Strand

2001-12-06T23:59:59.000Z

Note: This page contains sample records for the topic "furnaces heat air" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Furnace Black Characterization  

E-Print Network (OSTI)

Furnace Black Characterization Sid Richardson Carbon Co Fort Worth, TX Dr. Michel Gerspacher #12 of Crystallographic Studies #12;005F7 Methodologies #12;005F8 Summary · For all furnace carbon black 12� Surface Unorganized Carbon Identified #12;005F11 SRCC's Model #12;005F12 Carbon Black Surface Activity

202

High Levels of Winter Air Pollution under the Influence of the Urban Heat Island along the Shore of Tokyo Bay  

Science Conference Proceedings (OSTI)

A wintertime small-scale sea breeze associated with high levels of air pollution is described, in which the urban heat island plays an important role.

Hiroshi Yoshikado; Makoto Tsuchida

1996-10-01T23:59:59.000Z

203

Experimental Study of Heat Transfer and Flow Characteristics for a New Type of Air Heater  

E-Print Network (OSTI)

A new type air heater was developed, and an experimental set-up was built to analyze its characteristics. Within the Reynolds number from 2000 to 15000, the integrated characteristics in air heater channels with and without holed baffles have been studied experimentally. The experimental results show that the average Nu number increases greatly but the friction factor increases only slightly with the Re number. The Webb performance evaluation criterion has been adopted for analysis purposes. It is found that the integrated characteristics of heat transfer and flow friction increase with the hole's diameter at the same hole density (which is equal to the ratio of the hole's total area to the baffle's area), and the heat transfer rate increases with the hole density at the same hole diameter. The C type baffle has the best performance at the same heat transfer surface area and fan power consumption; its heat transfer rate improves about 44 to 69 percent.

Zheng, H.; Fan, X.; Li, A.

2006-01-01T23:59:59.000Z

204

Heat transfer and pressure drop for air flow through enhanced passages. Final report  

SciTech Connect

An extensive experimental investigation was carried out to determine the pressure drop and heat transfer characteristics for laminar, transitional and turbulent flow of air through a smooth passage and twenty-three enhanced passages. The internal surfaces of all enhanced passages had spirally shaped geometries; these included fluted, finned/ribbed and indented surfaces. The Reynolds number (Re) was varied between 400 and 50000. The effect of heat transfer (wall cooling or fluid heating) on pressure drop is most significant within the transition region; the recorded pressure drop with heat transfer is much higher than that without heat transfer. The magnitude of this effect depends markedly on the average surface temperature and, to a lesser extent, on the geometric characteristics of the enhanced surfaces. When the pressure drop data are reduced as values of the Fanning friction factor(f), the results are about the same with and without heat transfer for turbulent flow, with moderate differences in the laminar and transition regions.

Obot, N.T.; Esen, E.B.

1992-06-01T23:59:59.000Z

205

Heat transfer and pressure drop for air flow through enhanced passages  

SciTech Connect

An extensive experimental investigation was carried out to determine the pressure drop and heat transfer characteristics for laminar, transitional and turbulent flow of air through a smooth passage and twenty-three enhanced passages. The internal surfaces of all enhanced passages had spirally shaped geometries; these included fluted, finned/ribbed and indented surfaces. The Reynolds number (Re) was varied between 400 and 50000. The effect of heat transfer (wall cooling or fluid heating) on pressure drop is most significant within the transition region; the recorded pressure drop with heat transfer is much higher than that without heat transfer. The magnitude of this effect depends markedly on the average surface temperature and, to a lesser extent, on the geometric characteristics of the enhanced surfaces. When the pressure drop data are reduced as values of the Fanning friction factor(f), the results are about the same with and without heat transfer for turbulent flow, with moderate differences in the laminar and transition regions.

Obot, N.T.; Esen, E.B.

1992-06-01T23:59:59.000Z

206

Bulk Formulation of the Heat and Water Vapor Fluxes at the Air–Sea Interface, Including Nonmolecular Contributions  

Science Conference Proceedings (OSTI)

Accurate prediction of the air–sea sensible and latent heat fluxes is vital for nearly all applications of atmosphere and ocean models. Existing theories of heat transfer over rough surfaces provide a starting point, but they seem incomplete ...

James A. Mueller; Fabrice Veron

2010-01-01T23:59:59.000Z

207

State-of-the-Art in Residential and Small Commercial Air HandlerPerformance  

SciTech Connect

Although furnaces, air conditioners, and heat pumps have become significantly more efficient over the last couple of decades, residential air handlers have typical efficiencies of only 10% to 15% due to poor electric motor and aerodynamic performance. These low efficiencies indicate that there is significant room for improvement of air handler fans. The other 85-90% of the electricity used by air handlers is manifested as heat. This extra heat reduces air conditioning cooling and dehumidification performance and effectively acts as fuel switching for fossil fueled furnaces. For electric furnaces, this heat substitutes directly for the electric resistance heating elements. For heat pumps, this heat substitutes for compressor-based high COP heating and effectively reduces the COP of the heat pump. Using a combination of field observations and engineering judgment they can assemble a list of the problems that lead to low air handler efficiency and potential solutions to these problems, as shown. None of the problems require exotic or complex solutions and there are no technological barriers to adopting them. Some of the solutions are simple equipment swaps (using better electric motors), others require changes to the way the components are built (tighter tolerances) and other relate to HVAC equipment design (not putting large fans in small cabinets).

Walker, Iain S.

2005-03-01T23:59:59.000Z

208

Fossil fuel furnace reactor  

DOE Patents (OSTI)

A fossil fuel furnace reactor is provided for simulating a continuous processing plant with a batch reactor. An internal reaction vessel contains a batch of shale oil, with the vessel having a relatively thin wall thickness for a heat transfer rate effective to simulate a process temperature history in the selected continuous processing plant. A heater jacket is disposed about the reactor vessel and defines a number of independent controllable temperature zones axially spaced along the reaction vessel. Each temperature zone can be energized to simulate a time-temperature history of process material through the continuous plant. A pressure vessel contains both the heater jacket and the reaction vessel at an operating pressure functionally selected to simulate the continuous processing plant. The process yield from the oil shale may be used as feedback information to software simulating operation of the continuous plant to provide operating parameters, i.e., temperature profiles, ambient atmosphere, operating pressure, material feed rates, etc., for simulation in the batch reactor.

Parkinson, William J. (Los Alamos, NM)

1987-01-01T23:59:59.000Z

209

Molten metal holder furnace and casting system incorporating the molten metal holder furnace  

DOE Patents (OSTI)

A bottom heated holder furnace (12) for containing a supply of molten metal includes a storage vessel (30) having sidewalls (32) and a bottom wall (34) defining a molten metal receiving chamber (36). A furnace insulating layer (42) lines the molten metal receiving chamber (36). A thermally conductive heat exchanger block (54) is located at the bottom of the molten metal receiving chamber (36) for heating the supply of molten metal. The heat exchanger block (54) includes a bottom face (65), side faces (66), and a top face (67). The heat exchanger block (54) includes a plurality of electrical heaters (70) extending therein and projecting outward from at least one of the faces of the heat exchanger block (54), and further extending through the furnace insulating layer (42) and one of the sidewalls (32) of the storage vessel (30) for connection to a source of electrical power. A sealing layer (50) covers the bottom face (65) and side faces (66) of the heat exchanger block (54) such that the heat exchanger block (54) is substantially separated from contact with the furnace insulating layer (42).

Kinosz, Michael J. (Apollo, PA); Meyer, Thomas N. (Murrysville, PA)

2003-02-11T23:59:59.000Z

210

Air–Sea Heat Flux Measurements from Nearly Neutrally Buoyant Floats  

Science Conference Proceedings (OSTI)

The ability of neutrally buoyant, high-drag floats to measure the air–sea heat flux from within the turbulent oceanic boundary layer is investigated using float data from four different winter and fall float deployments. Two flux estimates can be ...

Eric A. D'Asaro

2004-07-01T23:59:59.000Z

211

Transpired Solar Collector at NREL's Waste Handling Facility Uses Solar Energy to Heat Ventilation Air  

Energy.gov (U.S. Department of Energy (DOE))

Revised fact sheet describes the transpired solar collector that was installed on NREL's Waste handling Facility (WHF) in 1990 to preheat ventilation air. The electrically heated WHF was an ideal candidate for this technology - requiring a ventilation rate of 3,000 cubic feet per meter to maintain safe indoor conditions.

212

Equatorial Waves in the Presence of Air-Sea Heat Exchange  

Science Conference Proceedings (OSTI)

Changes in propagation of free linear waves on the equatorial ?-plane associated with air-sea heat exchange are in investigated here. By using a mixed-layer model, with the waves considered as perturbations on a specified basic state, the usual ...

Howard P. Hanson

1983-07-01T23:59:59.000Z

213

Measurements of Momentum and Heat Transfer across the Air–Sea Interface  

Science Conference Proceedings (OSTI)

This study makes direct measurements of turbulent fluxes in the mixed layer in order to close heat and momentum budgets across the air–sea interface and to assess the ability of rigid-boundary turbulence models to predict mean vertical gradients ...

Gregory P. Gerbi; John H. Trowbridge; James B. Edson; Albert J. Plueddemann; Eugene A. Terray; Janet J. Fredericks

2008-05-01T23:59:59.000Z

214

Experimental study of the heat and mass transfer in a packed bed liquid desiccant air dehumidifier  

Science Conference Proceedings (OSTI)

Desiccant cooling systems have the ability to provide efficient humidity and temperature control while reducing the electrical energy requirement for air conditioning as compared to a conventional system. Naturally, the desiccant air dehumidification process greatly influences the overall performance of the desiccant system. Therefore, the effects of variables such as air and desiccant flow rates, air temperature and humidity, desiccant temperature and concentration, and the area available for heat and mass transfer are of great interest. Due to the complexity of the dehumidification process, theoretical modeling relies heavily upon experimental studies. However, a limited number of experimental studies are reported in the literature. This paper presents results from a detailed experimental investigation of the heat and mass transfer between a liquid desiccant (triethylene glycol) and air in a packed bed absorption tower using high liquid flow rates. A high performance packing that combines good heat and mass transfer characteristics with low pressure drop is used. The rate of dehumidification, as well as the effectiveness of the dehumidification process are assessed based on the variables listed above. Good agreement is shown to exist between the experimental findings and predictions from finite difference modeling. In addition, a comparison between the findings in the present study and findings previously reported in the literature is made. The results obtained from this study make it possible to characterize the important variables which impact the system design.

Oeberg, V.; Goswami, D.Y. [Univ. of Florida, Gainesville, FL (United States)

1998-11-01T23:59:59.000Z

215

Development of a High Performance Air Source Heat Pump for the US Market  

SciTech Connect

Heat pumps present a significant advantage over conventional residential heating technologies due to higher energy efficiencies and less dependence on imported oil. The US development of heat pumps dates back to the 1930 s with pilot units being commercially available in the 1950 s. Reliable and cost competitive units were available in the US market by the 1960 s. The 1973 oil embargo led to increased interest in heat pumps prompting significant research to improve performance, particularly for cold climate locations. Recent increasing concerns on building energy efficiency and environmental emissions have prompted a new wave of research in heat pump technology with special emphasis on reducing performance degradation at colder outdoor air temperatures. A summary of the advantages and limitations of several performance improvement options sought for the development of high performance air source heat pump systems for cold climate applications is the primary focus of this paper. Some recommendations for a high performance cold climate heat pump system design most suitable for the US market are presented.

Abdelaziz, Omar [ORNL; Shen, Bo [ORNL; Gao, Zhiming [ORNL; Baxter, Van D [ORNL; Iu, Ipseng [ORNL

2011-01-01T23:59:59.000Z

216

Seasonal efficiencies of residential heat pump air conditioners with inverter-driven compressors  

SciTech Connect

This paper describes a study to experimentally determine the steady-state characteristics, cyclic effect, and frosting/defrosting effect of a inverter heat pump currently available on the Japanese market and compute its seasonal efficiency based on the local outdoor air temperature data. It has been found that the APF of this heat pump is higher by 15% than that of the conventional fixed-speed heat pump. If cyclic and frosting/defrosting losses are eliminated, the APF of the inverter heat pump will be further improved by 2% to 6%. For the evaluation of an inverter heat pump, APF alone is not sufficient, and an additional parameter such as an annual comfort factor (ACF) is needed.

Hori, M.; Akamine, I.; Sakai, T.

1985-01-01T23:59:59.000Z

217

Experimental study of an air-source heat pump for simultaneous heating and cooling Part 2: Dynamic behaviour and two-phase thermosiphon  

E-Print Network (OSTI)

from the heat stock previously produced. The air and water heat exchangers have to carry out. While producing hot water using the water condenser, the cold water tank is heated, usually from 5 to 15 during the winter sequence enables to produce hot water continuously with improved average system

218

Cold End Inserts for Process Gas Waste Heat Boilers Air Products, operates hydrogen production plants, which utilize large waste heat boilers (WHB)  

E-Print Network (OSTI)

Cold End Inserts for Process Gas Waste Heat Boilers Overview Air Products, operates hydrogen production plants, which utilize large waste heat boilers (WHB) to cool process syngas. The gas enters satisfies all 3 design criteria. · Correlations relating our experimental results to a waste heat boiler

Demirel, Melik C.

219

Furnace Systems Technology Workshop  

Science Conference Proceedings (OSTI)

TMS Networking and Online Tools, X ... TMS Social Network and Site Tools .... furnace technology, fundamentals of fans and blowers, reduction of melt loss, refractory ... Sutton - Harbison-Walker Refractories; Jon Gillespie - Gillespie & Powers ...

220

Heat transfer mechanism with thin filaments including ceramic high temperature heat exchanger  

DOE Patents (OSTI)

A radiative heat transfer mechanism in a furnace having burners through which pulverized coal and air are burned producing combustion gases and contaminants. A plurality of elongated conduits are positioned inside the furnace proximate to the burners generally parallel to the flow of combustion gases in the furnace. A plurality of thin filaments are inside each of the elongated hollow conduits, the filaments having diameters in the range of from about 1 micrometer to about 1,000 micrometers and having an infrared radiation cross-section sufficient to cause the filaments to heat upon exposure to infrared radiation. Blower mechanism is associated with the elongated conduits for limiting the amount of soot and ash which deposit on the conduits to preserve the radiative and convective transfer of heat energy from the combustion gases to the conduits.

Im, Kwan H. (Naperville, IL); Ahluwalia, Rajesh K. (Burr Ridge, IL)

1994-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "furnaces heat air" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Heat transfer mechanism with thin filaments including ceramic high temperature heat exchanger  

DOE Patents (OSTI)

A radiative heat transfer mechanism in a furnace is described having burners through which pulverized coal and air are burned producing combustion gases and contaminants. A plurality of elongated conduits are positioned inside the furnace proximate to the burners generally parallel to the flow of combustion gases in the furnace. A plurality of thin filaments are inside each of the elongated hollow conduits, the filaments having diameters in the range of from about 1 micrometer to about 1,000 micrometers and having an infrared radiation cross-section sufficient to cause the filaments to heat upon exposure to infrared radiation. Blower mechanism is associated with the elongated conduits for limiting the amount of soot and ash which deposit on the conduits to preserve the radiative and convective transfer of heat energy from the combustion gases to the conduits. 7 figs.

Im, K.H.; Ahluwalia, R.K.

1994-10-18T23:59:59.000Z

222

The Earth-Coupled or Geothermal Heat Pump Air Conditioning System  

E-Print Network (OSTI)

As utility costs have risen despite political campaign promises and energy conserving measures implemented by the utility companies such as alternative fuel use (coal and nuclear), co-generation, etc., homeowners have begun to search for effective methods of reducing their electricity bills. In some cases homeowners are faced with utility bills That are approaching the cost of their mortgage payments. For those with fixed incomes, such as the elderly or those looking forward to retirement in the near future, this has become an alarming reality. Virtually every homeowner would like to reduce his utility bill but the question is, what items should he address in order to have a significant impact on his electricity costs? According to Houston Lighting h Power Company, 50% of an electricity bill can be attributed to the air conditioning system, and another 15-20% to the hot water heating system. Therefore, to dramatically reduce utility costs one should look first at these two "energy gulpers" and next at proper home insulation, window coverings, etc. The other electrical appliances in the home use relatively minor amounts of electricity compared to the air conditioning and hot water heating system. This paper will describe the geothermal heat pump and the desuperheater as the latest developments in energy efficient air conditioning and water heating.

Wagers, H. L.; Wagers, M. C.

1985-01-01T23:59:59.000Z

223

Vertical feed stick wood fuel burning furnace system  

DOE Patents (OSTI)

A new and improved stove or furnace for efficient combustion of wood fuel including a vertical feed combustion chamber for receiving and supporting wood fuel in a vertical attitude or stack, a major upper portion of the combustion chamber column comprising a water jacket for coupling to a source of water or heat transfer fluid and for convection circulation of the fluid for confining the locus of wood fuel combustion to the bottom of the vertical gravity feed combustion chamber. A flue gas propagation delay channel extending from the laterally directed draft outlet affords delayed travel time in a high temperature environment to assure substantially complete combustion of the gaseous products of wood burning with forced air as an actively induced draft draws the fuel gas and air mixture laterally through the combustion and high temperature zone. Active sources of forced air and induced draft are included, multiple use and circuit couplings for the recovered heat, and construction features in the refractory material substructure and metal component superstructure.

Hill, Richard C. (Orono, ME)

1984-01-01T23:59:59.000Z

224

Life-cycle cost analysis of energy efficiency design options for residential furnaces and boilers  

E-Print Network (OSTI)

equipment = furnace Heating fuel = oil Home type = single orequipment = boiler Heating fuel = oil Home type = single orHOME HEATING FUEL CON 3 NATURAL GAS FROM UNDERGROUND PIPES = 1 BOTTLED GAS (LPG OR PROPANE) = 2 FUEL OIL

Lutz, James; Lekov, Alex; Whitehead, Camilla Dunham; Chan, Peter; Meyers, Steve; McMahon, James

2004-01-01T23:59:59.000Z

225

Estimating Air–Sea Heat Fluxes in Semienclosed Basins: The Case of the Gulf of Elat (Aqaba)  

Science Conference Proceedings (OSTI)

Meteorological and oceanographic data collected at the head of the Gulf of Elat were used to compute the air–sea heat flux components and the heat storage in the water column, which are in turn used to estimate the heat balance of this ...

Moshe Ben-Sasson; Steve Brenner; Nathan Paldor

2009-01-01T23:59:59.000Z

226

13 SEER Standard for Central Air Conditioners and Heat Pumps (released in AEO2005)  

Reports and Publications (EIA)

In January 2004, after years of litigation in a case that pitted environmental groups and Attorneys General from 10 States against the U.S. Secretary of Energy, the U.S. Court of Appeals for the Second Circuit reestablished the central air conditioner and heat pump standard originally set in January 2001 [3]. The Courts ruling, which struck down a May 2002 rollback of the 2001 standard to a 12 SEER, mandates that all new central air conditioners and heat pumps meet a 13 SEER standard by January 2006, requiring a 30-percent increase in efficiency relative to current law. The AEO2005 reference case incorporates the 13 SEER standard as mandated by the Courts ruling.

Information Center

2005-04-01T23:59:59.000Z

227

Partially Reduced Feedstocks and Blast Furnace Ironmaking ...  

Science Conference Proceedings (OSTI)

... Partially Reduced Feedstocks and Blast Furnace Ironmaking Carbon Intensity ... simple Rist-style blast furnace mass and energy balance, assuming furnace ...

228

Argonne Software Licensing: Glass Furnace Model (GFM)  

The Glass Furnace Model (GFM) The Glass Furnace Model (GFM) Version 4.0, a computational fluid dynamic (CFD) glass furnace simulation code was developed at Argonne ...

229

Air-Source Integrated Heat Pump for Near-Zero Energy Houses: Technology Status Report  

Science Conference Proceedings (OSTI)

This report documents the development of an air-source integrated heat pump (AS-IHP) through the third quarter of FY2007. It describes the design, analyses and testing of the AS-IHP, and provides performance specifications for a field test prototype and proposed control strategy. The results obtained so far continue to support the AS-IHP being a promising candidate to meet the energy service needs for DOE's development of a Zero Energy Home (ZEH) by the year 2020.

Murphy, Richard W [ORNL; Rice, C Keith [ORNL; Baxter, Van D [ORNL; Craddick, William G [ORNL

2007-07-01T23:59:59.000Z

230

Nuclear Maintenance Applications Center: Heating, Ventilating, and Air Conditioning Specialist Guide  

Science Conference Proceedings (OSTI)

The people responsible for heating, ventilating, and air conditioning (HVAC) in the nuclear power industry are known by various titles--HVAC specialist, HVAC component engineer, HVAC system manager, and HVAC system engineer, to name a few. Although HVAC duties and responsibilities are often spread across several departments, such as maintenance, operations, engineering, and procurement, it is up to the HVAC specialist to ensure that HVAC system and component health and reliability are maintained. This re...

2011-11-28T23:59:59.000Z

231

Performance Assessment of a Variable Refrigerant Flow Heat Pump Air Conditioning System  

Science Conference Proceedings (OSTI)

Variable refrigerant flow (VRF) technology uses smart integrated controls, variable speed drives, and refrigerant piping to provide energy efficiency, flexible operation, ease of installation, low noise, zone control, and comfort through all-electric technology. This report describes and documents the construction, performance, and application of a heat pump air conditioning system that uses VRF technology8212the Daikin VRV system. This variable refrigerant volume (VRV) system is manufactured by Daikin I...

2008-12-17T23:59:59.000Z

232

Flicker Reduction Technology for Electric Heat Pumps and Central Air Conditioners  

Science Conference Proceedings (OSTI)

Electric heat pumps and air conditioners move thermal energy into and/or out of conditioned spaces. During startup, the compressor motor temporarily draws high current (inrush) from the power distribution system to accelerate the compressor from standstill to its nominal operating speed. The inrush current causes a voltage drop in the power distribution system between the compressor motor and the utility service transformer. Although very brief in durationjust fractions of a secondthe voltage drop can ca...

2011-12-28T23:59:59.000Z

233

Model for determining modular heat recovery incinerator feasibility on air force installations. Master's thesis  

Science Conference Proceedings (OSTI)

This study constructed a model to determine the feasibility of building municipal solid waste (MSW) fired modular heat recovery incinerators (HRIs) on Air Force installations. The model consisted of three gates. Gate one identified current federal regulatory air emission requirements for various HRI pollutants. It also specified two air pollution control configurations with emission reduction efficiencies capable of achieving these requirements. Gate two presented a life-cycle cost (LCC) economic analysis methodology. Operational and cost data for existing modular HRIs located in the United States facilitated the development of regression equations that estimate capital and annual operating costs for a modular HRI. Actual cost and operational information from a central heating plant at Wright-Patterson AFB, along with cost data from the regression equations, provided the basis for an example LCC analysis involving modular HRIs Results of this hypothetical evaluation showed that the LCC for the modular HRI alternatives were both less than the LCC of replacing the existing boiler. Gate three presented a Likert-scale survey to evaluate the sociopolitical acceptability of the proposed HRI. The survey results indicate the level of effort to process the HRI proposal in accordance with the National Environmental Policy Act. Heat recovery, Incinerators, Waste management, Waste treatment.

Anderson, A.H.; Munnell, P.R.

1992-09-01T23:59:59.000Z

234

Air thermosiphon solar heating system: the Jones house, Santa Fe, New Mexico  

DOE Green Energy (OSTI)

A hybrid passive/active solar heating system, featuring a passive air thermosiphon loop, is described. Heated air is supplied to a rock storage bin, coupled with blower-driven air distribution to the house. The house, of 246 m/sup 2/ (2650 ft/sup 2/) heated area and located in Santa Fe, New Mexico, also includes a greenhouse located under the planar collector array. Architectural features and construction details of the house, the solar collector, storage, and distribution system are presented. Representative results of three months of monitoring by the Los Alamos Scientific Laboratory of collector, rock bin, and greenhouse temperatures, as well as outside ambient temperature and insolation, are reported and discussed. Data recorded hourly since the system was placed in operation in early February 1978, show temperatures in the rock bin in excess of 71/sup 0/C (160/sup 0/F) and in the collector absorber mesh in excess of 93/sup 0/C (200/sup 0/F). Delivery temperatures from the charged bin, without auxiliary boost, range from 38 to 54/sup 0/C (100 to 130/sup 0/F).

Hunn, B.D.; Jones, M.M.

1978-01-01T23:59:59.000Z

235

Effect of excess air on the optimization of heating appliances for biomass combustion  

Science Conference Proceedings (OSTI)

The performance of a domestic appliance for wood logs combustion is a function of several variables, such as the geometric design of the appliance and its operating parameters. Among them, air feeding conditions are really decisive if the objective function is the maximization of the heat recovered from flue gases. Therefore, even if pollutant emissions have to be ever considered, the amount of excess air can be seen as a fundamental parameter in the definition of thermal efficiency of the appliance. In this paper the role of this parameter is analysed. The analysis is conducted by linking the results obtained from experimental data, detailed CFD simulations and a simplified mathematical model based on a network of CSTR. The derivation of an idealized schematization of the appliance was essential to realize the role of excess air variations, with more generality than with respect to a specific appliance configuration. Conversely, while the experimental data and CFD results were necessary to derive the simplified model, the indications given by this simplified model were useful to analyze results coming from both experiments and detailed numerical simulations. It has been evidenced the need to distinguish between the role of excess air in the chemical combustion and in the heat recovery in the appliance as well as to quantify the feedback between these two processes. (author)

Menghini, D. [Dipartimento di Ingegneria Chimica, Universita degli studi di Napoli Federico II, Piazzale Tecchio 80, 80125 Napoli (Italy); Marra, F.S.; Allouis, C.; Beretta, F. [Consiglio Nazionale delle Ricerche, Istituto di Ricerche sulla Combustione - CNR, via Diocleziano 328, 80124 Napoli (Italy)

2008-07-15T23:59:59.000Z

236

Furnace | OpenEI  

Open Energy Info (EERE)

Furnace Furnace Dataset Summary Description The following data-set is for a benchmark residential home for all TMY3 locations across all utilities in the US. The data is indexed by utility service provider which is described by its "unique" EIA ID ( Source National Renewable Energy Laboratory Date Released April 05th, 2012 (2 years ago) Date Updated April 06th, 2012 (2 years ago) Keywords AC apartment CFL coffeemaker Computer cooling cost demand Dishwasher Dryer Furnace gas HVAC Incandescent Laptop load Microwave model NREL Residential television tmy3 URDB Data text/csv icon Residential Cost Data for Common Household Items (csv, 14.5 MiB) Quality Metrics Level of Review Some Review Comment Temporal and Spatial Coverage Frequency Annually Time Period License License Open Data Commons Public Domain Dedication and Licence (PDDL)

237

Laboratory Evaluation of Residential Furnace BlowerPerformance  

SciTech Connect

A testing program was undertaken at Lawrence Berkeley National Laboratory and an electric utility (Pacific Gas and Electric Co.) to compare the performance of furnace blowers. This laboratory testing program was undertaken to support potential changes to California Building Standards regarding in-field furnace blower energy use. This technical support includes identifying suitable performance metrics and target performance levels for use in standards. Five different combinations of blowers and residential furnaces were tested for air moving performance. Three different types of blower and motor combinations were tested in two different furnace cabinets. The blowers were standard forward--curved impellors and a prototype impeller with reverse-inclined blades. The motors were two 6-pole permanent split capacitor (PSC) single-phase induction motors, a brushless permanent magnet (BPM) motor and a prototype BPM designed for use with a prototype reverse-inclined impellor. The laboratory testing operated each blower and furnace combination over a range of air flows and pressure differences to determine air flow performance, power consumption and efficiency. Additional tests varied the clearance between the blower housing and the furnace cabinet, and the routing of air flow into the blower cabinet.

Walker, Iain S.; Lutz, Jim D.

2005-09-01T23:59:59.000Z

238

Energy Basics: Solar Liquid Heating  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Homes & Buildings Printable Version Share this resource Lighting & Daylighting Passive Solar Design Space Heating & Cooling Cooling Systems Heating Systems Furnaces & Boilers Wood...

239

Heat Pumps | Department of Energy  

NLE Websites -- All DOE Office Websites (Extended Search)

existing heat contained within the earth -- a clean, reliable, and renewable source of energy. In moderate climates, heat pumps can be an energy-efficient alternative to furnaces...

240

Energy Saving Potentials and Air Quality Benefits of Urban HeatIslandMitigation  

SciTech Connect

Urban areas tend to have higher air temperatures than their rural surroundings as a result of gradual surface modifications that include replacing the natural vegetation with buildings and roads. The term ''Urban Heat Island'' describes this phenomenon. The surfaces of buildings and pavements absorb solar radiation and become extremely hot, which in turn warm the surrounding air. Cities that have been ''paved over'' do not receive the benefit of the natural cooling effect of vegetation. As the air temperature rises, so does the demand for air-conditioning (a/c). This leads to higher emissions from power plants, as well as increased smog formation as a result of warmer temperatures. In the United States, we have found that this increase in air temperature is responsible for 5-10% of urban peak electric demand for a/c use, and as much as 20% of population-weighted smog concentrations in urban areas. Simple ways to cool the cities are the use of reflective surfaces (rooftops and pavements) and planting of urban vegetation. On a large scale, the evapotranspiration from vegetation and increased reflection of incoming solar radiation by reflective surfaces will cool a community a few degrees in the summer. As an example, computer simulations for Los Angeles, CA show that resurfacing about two-third of the pavements and rooftops with reflective surfaces and planting three trees per house can cool down LA by an average of 2-3K. This reduction in air temperature will reduce urban smog exposure in the LA basin by roughly the same amount as removing the basin entire onroad vehicle exhaust. Heat island mitigation is an effective air pollution control strategy, more than paying for itself in cooling energy cost savings. We estimate that the cooling energy savings in U.S. from cool surfaces and shade trees, when fully implemented, is about $5 billion per year (about $100 per air-conditioned house).

Akbari, Hashem

2005-08-23T23:59:59.000Z

Note: This page contains sample records for the topic "furnaces heat air" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

New Insights into the Ocean Heat Budget Closure Problem from Analysis of the SOC Air–Sea Flux Climatology  

Science Conference Proceedings (OSTI)

Results from an analysis of the Southampton Oceanography Centre (SOC) global air–sea heat flux climatology, which has been calculated using in situ weather reports from voluntary observing ships covering the period 1980–93, are presented. ...

Simon A. Josey; Elizabeth C. Kent; Peter K. Taylor

1999-09-01T23:59:59.000Z

242

Estimating Regional Surface Heat and Moisture Fluxes above Prairie Cropland from Surface and Upper-Air Measurements  

Science Conference Proceedings (OSTI)

Upper-air budget methods can be used to estimate the surface sensible and latent heat flux densities on a regional scale. This study assesses the application of radiosonde-based budget methods above homogeneous cropland. Serial daytime soundings ...

Alan G. Barr; G. S. Strong

1996-10-01T23:59:59.000Z

243

Fine Adjustment of Large Scale Air-Sea Energy Flux Parameterizations by Direct Estimates of Ocean Heat Transport  

Science Conference Proceedings (OSTI)

An inverse technique is used to adjust uncertain coefficients and parameters in the bulk formulae of climatological air-sea energy fluxes in order to obtain an agreement of indirect estimates of meridional heat transport with direct estimates in ...

Hans-Jörg Isemer; Jürgen Willebrand; Lutz Hasse

1989-10-01T23:59:59.000Z

244

Opportunities for Saving Energy and Improving Air Quality in Urban Heat Islands  

E-Print Network (OSTI)

Refrigeration, and Air conditioning Engineers, Atlanta,Refrigeration, and Air Conditioning Engineers, Atlanta,Refrigeration, and Air Conditioning Engineers, Atlanta,

Akbari, Hashem

2008-01-01T23:59:59.000Z

245

Precision control of high temperature furnaces using an auxiliary power supply and charged particle current flow  

DOE Patents (OSTI)

Two power supplies are combined to control a furnace. A main power supply heats the furnace in the traditional manner, while the power from the auxiliary supply is introduced as a current flow through charged particles existing due to ionized gas or thermionic emission. The main power supply provides the bulk heating power and the auxiliary supply provides a precise and fast power source such that the precision of the total power delivered to the furnace is improved. 5 figs.

Pollock, G.G.

1997-01-28T23:59:59.000Z

246

Precision control of high temperature furnaces using an auxiliary power supply and charged practice current flow  

DOE Patents (OSTI)

Two power supplies are combined to control a furnace. A main power supply heats the furnace in the traditional manner, while the power from the auxiliary supply is introduced as a current flow through charged particles existing due to ionized gas or thermionic emission. The main power supply provides the bulk heating power and the auxiliary supply provides a precise and fast power source such that the precision of the total power delivered to the furnace is improved.

Pollock, George G. (San Ramon, CA)

1997-01-01T23:59:59.000Z

247

A genetic rule weighting and selection process for fuzzy control of heating, ventilating and air conditioning systems  

Science Conference Proceedings (OSTI)

In this paper, we propose the use of weighted linguistic fuzzy rules in combination with a rule selection process to develop accurate fuzzy logic controllers dedicated to the intelligent control of heating, ventilating and air conditioning systems concerning ... Keywords: BEMS, building energy management system, FLC, fuzzy logic controller, Fuzzy logic controllers, GA, genetic algorithm, Genetic algorithms, HVAC systems, HVAC, heating, ventilating, and air conditioning, KB, knowledge base, PMV, predicted mean vote index for thermal comfort, Rule selection, Weighted fuzzy rules

Rafael Alcalá; Jorge Casillas; Oscar Cordón; Antonio González; Francisco Herrera

2005-04-01T23:59:59.000Z

248

Simulations of sizing and comfort improvements for residential forced-air heating and cooling systems  

SciTech Connect

In many parts of North America residential HVAC systems are installed outside conditioned space. This leads to significant energy losses and poor occupant comfort due to conduction and air leakage losses from the air distribution ducts. In addition, cooling equipment performance is sensitive to air flow and refrigerant charge that have been found to be far from manufacturers specifications in most systems. The simulation techniques discussed in this report were developed in an effort to provide guidance on the savings potentials and comfort gains that can be achieved by improving ducts (sealing air leaks) and equipment (correct air-flow and refrigerant charge). The simulations include the complex air flow and thermal interactions between duct systems, their surroundings and the conditioned space. They also include cooling equipment response to air flow and refrigerant charge effects. Another key aspect of the simulations is that they are dynamic to account for cyclic losses from the HVAC system and the effect of cycle length on energy and comfort performance. To field test the effect of changes to residential HVAC systems requires extensive measurements to be made for several months for each condition tested. This level of testing is often impractical due to cost and time limitations. Therefore the Energy Performance of Buildings Group at LBNL developed a computer simulation tool that models residential HVAC system performance. This simulation tool has been used to answer questions about equipment downsizing, duct improvements, control strategies and climate variation so that recommendations can be made for changes in residential construction and HVAC installation techniques that would save energy, reduce peak demand and result in more comfortable homes. Although this study focuses on California climates, the simulation tool could easily be applied to other climates. This report summarizes the simulation tool and discusses the significant developments that allow the use of this tool to perform detailed residential HVAC system simulations. The simulations have been verified by comparison to measured results in several houses over a wide range of weather conditions and HVAC system performance. After the verification was completed, more than 350 cooling and 450 heating simulations were performed. These simulations covered a range of HVAC system performance parameters and California climate conditions (that range from hot dry deserts to cold mountain regions). The results of the simulations were used to show the large increases in HVAC system performance that can be attained by improving the HVAC duct distribution systems and by better sizing of residential HVAC equipment. The simulations demonstrated that improved systems can deliver improved heating or cooling to the conditioned space, maintain equal or better comfort while reducing peak demand and the installed equipment capacity (and therefore capital costs).

Walker, I.S.; Degenetais, G.; Siegel, J.A.

2002-05-01T23:59:59.000Z

249

Furnace characterization for horizontal shipping container thermal testing  

SciTech Connect

In order to perform regulatory thermal tests required by 10 CFR 71.73(c)(3) on the newly designed Horizontal Shipping Container (HSC), it was necessary to find a company involved in the business of heat treating who was willing to allow their furnace to be used for these tests. Of the companies responding to a request for interest, Lindberg Heat Treating Company`s Solon, Ohio, facility was found to be the best available vendor for this activity. Their furnace was instrumented and characterized such that these tests could be performed in a manner that would conform to the specifications contained in 10 CFR 71. It was found that Lindberg`s furnace was usable for this task, and recommendations concerning the use of this furnace for the above stated purpose are made herein.

Feldman, M.R.

1994-05-01T23:59:59.000Z

250

Outdoor Air, Heat Wheels and JCPenney: A New Approach to Retail Ventilation  

E-Print Network (OSTI)

JCPenney Construction Services department is responsible for the construction of new stores, takeover of existing facilities to create a new store, repairs to existing JCPenney facilities and the expansion and modernization of stores across the nation and the world. Each year, JCPenney Construction Services handles approximately 50 projects along these lines. After the implementation of ASHRAE 62- 1989 by JCPenney and many major building codes, including BOCA, mechanical engineers at JCPenney noticed a sharp increase in the percentage of cooling capacity required to cool the outdoor ventilation air. In an effort to limit this impact, both in first cost and in operational costs, JCPenney is beginning to make an effort to use enthalpy heat wheels in the hot and humid climate areas where it is economically feasible. This paper discusses the efforts of JCPenney to implement this option to the treatment of outdoor air in a store in Baton Rouge, LA while maintaining indoor air quality requirements as stated in ASHRAE Standard 62-1989 and maintaining energy efficiency. This paper also discusses the projected energy savings and operations of this alternative to the standard treatment of outdoor air.

Smith, C. S.; Bartlett, T. A.

1998-01-01T23:59:59.000Z

251

Heat Transfer Analysis of Post-Weld Heat Treatment of Grade 91 Steel  

Science Conference Proceedings (OSTI)

The appropriate heat transfer coefficients are determined through the inverse heat conduction method utilizing ceramic heat blankets as well as a furnace as the ...

252

Field Measurements of Efficiency and Duct Effectiveness in Residential Forced Air Distributions Systems  

E-Print Network (OSTI)

sealing and insulating the duct system. ABSTRACT Forced airair conditioning, gas furnaces, electric furnaces and heat pumps. The retrofits consisted of sealing

Jump, D.A.

2011-01-01T23:59:59.000Z

253

How refrigeration, heating, ventilation, and air conditioning service technicians learn from troubleshooting (Dissertation ABstract)  

E-Print Network (OSTI)

The purpose of this study was to understand how refrigeration, heating, ventilation, and air conditioning (RHVAC) service technicians (techs) learned from troubleshooting. This understanding resulted in instructional and curricular strategies designed to help community colleges prepare vocational students to learn more effectively from informal workplace learning. RHVAC techs were studied because they increasingly learn their trade skills through a combination of formal schooling and informal workplace learning, though many still learn their trade almost exclusively in the workplace. Even those with formal training require considerable workplace experience to become fully competent. Troubleshooting is a major job function for RHVAC service techs, and troubleshooting

Denis F. H. Green

2006-01-01T23:59:59.000Z

254

Numerical investigation of electric heating impacts on solid/liquid glass flow patterns.  

SciTech Connect

A typical glass furnace consists of a combustion space and a melter. Intense heat is generated from the combustion of fuel and air/oxygen in the combustion space. This heat is transferred mainly by radiation to the melter in order to melt sand and cullet (scrap glass) eventually creating glass products. Many furnaces use electric boosters to enhance glass melting and increase productivity. The coupled electric/combustion heat transfer patterns are key to the glass making processes. The understanding of the processes can lead to the improvement of glass quality and furnace efficiency. The effects of electrical boosting on the flow patterns and heat transfer in a glass melter are investigated using a multiphase Computational Fluid Dynamics (CFD) code with addition of an electrical boosting model. The results indicate that the locations and spacing of the electrodes have large impacts on the velocity and temperature distributions in the glass melter. With the same total heat input, the batch shape (which is determined by the overall heat transfer and the batch melting rate) is kept almost the same. This indicates that electric boosting can be used to replace part of heat by combustion. Therefore, temperature is lower in the combustion space and the life of the furnace can be prolonged. The electric booster can also be used to increase productivity without increasing the furnace size.

Chang, S. L.; Zhou, C. Q.; Golchert, B.

2002-07-02T23:59:59.000Z

255

Buildings Energy Data Book: 5.3 Heating, Cooling, and Ventilation Equipment  

Buildings Energy Data Book (EERE)

3 3 Main Commercial Primary Energy Use of Heating and Cooling Equipment as of 1995 Heating Equipment | Cooling Equipment Packaged Heating Units 25% | Packaged Air Conditioning Units 54% Boilers 21% | Room Air Conditioning 5% Individual Space Heaters 2% | PTAC (2) 3% Furnaces 20% | Centrifugal Chillers 14% Heat Pumps 5% | Reciprocating Chillers 12% District Heat 7% | Rotary Screw Chillers 3% Unit Heater 18% | Absorption Chillers 2% PTHP & WLHP (1) 2% | Heat Pumps 7% 100% | 100% Note(s): Source(s): 1) PTHP = Packaged Terminal Heat Pump, WLHP = Water Loop Heat Pump. 2) PTAC = Packaged Terminal Air Conditioner BTS/A.D. Little, Energy Consumption Characteristics of Commercial Building HVAC Systems, Volume 1: Chillers, Refrigerant Compressors, and Heating Systems, Apr. 2001, Figure 5-5, p. 5-14 for cooling and Figure 5-10, p. 5-18 for heating

256

AIR LEAKAGE, SURFACE PRESSURES AND INFILTRATION RATES IN HOUSES  

E-Print Network (OSTI)

Active solar heating Sealed combustion wood stove. 174 mradiant heating system; sealed combustion wood stove back-One story wood frame construction. floor furnace heating. m

Grimsrud, D.T.

2011-01-01T23:59:59.000Z

257

Application of the VRV Air-Conditioning System Heat Recovery Series in Interior Zone and Analysis of its Energy Saving  

E-Print Network (OSTI)

To reduce the energy consumption of air conditioning systems, we can use the VRV air conditioning system to supply cold loads in the winter for rooms in the construction inner zone where cold loads need to be supplied. The VRV air-conditioning system of variable frequency technology can achieve the effect of energy conservation. In this article, we analyze the application of the VRV air conditioning system heat recovery series in the construction inner zone and its energy saving characteristics via a project example.

Zhang, Q.; Li, D.; Zhang, J.

2006-01-01T23:59:59.000Z

258

Evaluation of a residential solar air heating system. Interim progress report, August 1976--May 1977. [Comparison of air-type and liquid-type collectors  

SciTech Connect

The comparative performance of Solar House II collectors (air heater) and Solar House I collectors (liquid heater) is presented. In the 1976 comparison year, there is no conclusive evidence that either system provides a greater fraction of the seasonal load. Both systems were designed to provide approximately 75 percent of the annual space and water heating load, and the design targets are reasonably achieved. In February, 1976, the air system provided 65 percent of the total requirement while the liquid system provided 76 percent. In March, based on a few days of data, the performance was substantially the same. In April the air system provided a greater fraction of solar heat to the total need, but the use of the heat was different, more being used for domestic water heating in Solar House I than in Solar House II. The data for 1977 have not yet been fully analyzed for both solar houses and therefore, a complete comparison cannot be made. At this stage in the evaluations, it can be stated that either system can be designed to achieve the target fraction of the total annual heat requirements. (WHK)

Karaki, S.

1977-05-01T23:59:59.000Z

259

Air-to-Water Heat Pumps With Radiant Delivery in Low-Load Homes  

SciTech Connect

Space conditioning represents nearly 50% of average residential household energy consumption, highlighting the need to identify alternative cost-effective, energy-efficient cooling and heating strategies. As homes are better built, there is an increasing need for strategies that are particularly well suited for high performance, low load homes. ARBI researchers worked with two test homes in hot-dry climates to evaluate the in-situ performance of air-to-water heat pump (AWHP) systems, an energy efficient space conditioning solution designed to cost-effectively provide comfort in homes with efficient, safe, and durable operation. Two monitoring projects of test houses in hot-dry climates were initiated in 2010 to test this system. Both systems were fully instrumented and have been monitored over one year to capture complete performance data over the cooling and heating seasons. Results are used to quantify energy savings, cost-effectiveness, and system performance using different operating modes and strategies. A calibrated TRNSYS model was developed and used to evaluate performance in various climate regions. This strategy is most effective in tight, insulated homes with high levels of thermal mass (i.e. exposed slab floors).

Backman, C.; German, A.; Dakin, B.; Springer, D.

2013-12-01T23:59:59.000Z

260

Field Test of High Efficiency Residential Buildings with Ground-source and Air-source Heat Pump Systems  

SciTech Connect

This paper describes the field performance of space conditioning and water heating equipment in four single-family residential structures with advanced thermal envelopes. Each structure features a different, advanced thermal envelope design: structural insulated panel (SIP); optimum value framing (OVF); insulation with embedded phase change materials (PCM) for thermal storage; and exterior insulation finish system (EIFS). Three of the homes feature ground-source heat pumps (GSHPs) for space conditioning and water heating while the fourth has a two-capacity air-source heat pump (ASHP) and a heat pump water heater (HPWH). Two of the GCHP-equipped homes feature horizontal ground heat exchange (GHX) loops that utillize the existing foundation and utility service trenches while the third features a vertical borehole with vertical u-tube GHX. All of the houses were operated under the same simulated occupancy conditions. Operational data on the house HVAC/Water heating (WH) systems are presented and factors influencing overall performance are summarized.

Ally, Moonis Raza [ORNL; Munk, Jeffrey D [ORNL; Baxter, Van D [ORNL

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "furnaces heat air" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

HIGH TEMPERATURE MICROSCOPE AND FURNACE  

DOE Patents (OSTI)

A high-temperature microscope is offered. It has a reflecting optic situated above a molten specimen in a furnace and reflecting the image of the same downward through an inert optic member in the floor of the furnace, a plurality of spaced reflecting plane mirrors defining a reflecting path around the furnace, a standard microscope supported in the path of and forming the end terminus of the light path.

Olson, D.M.

1961-01-31T23:59:59.000Z

262

Development of a high-performance coal-fired power generating system with pyrolysis gas and char-fired high temperature furnace (HITAF)  

SciTech Connect

A concept for an advanced coal-fired combined-cycle power generating system is currently being developed. The first phase of this three-phase program consists of conducting the necessary research and development to define the system, evaluate the economic and technical feasibility of the concept, and prepare an R D plan to develop the concept further. Foster Wheeler Development Corporation is leading a team ofcompanies involved in this effort. The system proposed to meet these goals is a combined-cycle system where air for a gas turbine is indirectly heated to approximately 1800[degrees]F in furnaces fired with cool-derived fuels and then directly heated in a natural-gas-fired combustor up to about 2400[degrees]F. The system is based on a pyrolyzing process that converts the coal into a low-Btu fuel gas and char. The fuelgas is a relatively clean fuel, and it is fired to heat tube surfaces that are susceptible to corrosion and problems from ash deposition. In particular, the high-temperature air heater tubes, which will need tobe a ceramic material, will be located in a separate furnace or region of a furnace that is exposed to combustion products from the low-Btu fuel gas only. A simplified process flow diagram is shown.

Not Available

1992-11-01T23:59:59.000Z

263

Development of a high-performance coal-fired power generating system with pyrolysis gas and char-fired high temperature furnace (HITAF). Progress report No. 12, September--December 1994  

SciTech Connect

A concept for an advanced coal-fired combined-cycle power generating system is currently being developed. The first phase of this three-phase program consists of conducting the necessary research and development to define the system, evaluating the economic and technical feasibility of the concept, and preparing an R&D plan to develop the concept further. There are two basic arrangements of our HIPPS cycle. Both are coal-fired combined cycles. One arrangement is the 35% natural gas HIPPS. Coal is converted to fuel gas and char in a pyrolysis process, and these fuels are fired in separate parts of a high temperature advanced furnace (HITAF). The char-fired furnace produces flue gas that is used to heat gas turbine air up to 1400 F. Alloy tubes are used for these tube banks. After leaving the alloy tube banks, the gas turbine air goes through a ceramic air heater where it is heated from 1400 F to 1800 F. The flue gas that goes through the ceramic air heater comes from the combustion of the fuel gas that is produced in the pyrolysis process. This fuel gas is cleaned to remove particulates and alkalies that would corrode and plug a ceramic air heater. The air leaving the ceramic air heater needs to be heated further to achieve the efficiency goal of 47%, and this is done by firing natural gas in the gas turbine combustor. An alternative arrangement of the HIPPS cycle is called the All Coal HIPPS. With this arrangement, the char is used to heat the gas turbine air to 1400 F as before, but instead of then going to a ceramic air heater, the air goes directly to the gas turbine combustor. The fuel gas generated in the pyrolyzer is used as fuel in the gas turbine combustor. In both cycle arrangements, heat is transferred to the steam cycle in the HITAF and a heat recovery steam generator (HRSG).

1995-06-01T23:59:59.000Z

264

Design and Analysis of High-Performance Air-Cooled Heat Exchanger with an Integrated Capillary-Pumped Loop Heat Pipe  

E-Print Network (OSTI)

We report the design and analysis of a high-power air-cooled heat exchanger capable of dissipating over 1000 W with 33 W of input electrical power and an overall thermal resistance of less than 0.05 K/W. The novelty of the ...

McCarthy, Matthew

265

Ceramic heat pipes for high temperature heat removal  

SciTech Connect

Difficulties in finding metal or protected metal components that exhibit both strength and corrosion resistance at high temperature have severely restricted the application of effective heat recovery techniques to process heat furnaces. A potential method of overcoming this restriction is to use heat pipes fabricated from ceramic materials to construct counterflow recuperators. A development program has been initiated to demonstrate the technical and eventually the economical feasibility of ceramic heat pipes and ceramic heat pipe recuperators. The prime candidate for heat pipe construction is SiC. Closed-end tubes of this material have been prepared by chemical vapor deposition (CVD). These tubes were lined internally with tungsten by a subsequent CVD operation, partially filled with sodium, and sealed by brazing a tungsten lined SiC plug into the open-end with a palladium--cobalt alloy. Heat pipes constructed in this manner have been successfully operated in vacuum at temperatures of 1225/sup 0/K and in air at a temperature of 1125/sup 0/K. The heat source used initially for the air testing was an induction heated metallic sleeve in thermal contact with the test unit. Subsequent testing has shown that a silicon carbide heat pipe can be successfully operated with natural gas burners providing the input heat. Methods of fabricating and testing these devices are described.

Keddy, E.S.; Ranken, W.A.

1978-01-01T23:59:59.000Z

266

Heating  

SciTech Connect

According to The Hydronics Institute, the surge in gas-fired boiler shipments brought about 3 years ago by high oil prices and the availability of natural gas after years of curtailment has almost competely subsided. Gas prices continue to escalate and the threat of decontrol by 1985 continues. Likewise, the Gas Appliance Manufacturers Association reports that shipments of gas-fired unit heaters, duct furnaces, and wall furnaces have also dropped as homeowners adopt a wait-and-see attitude toward conversion. However, the market for high- and ultra-high-efficiency furnaces appears to hold potential for expansion. Because of the rebounding home market, a steady replacement market, and increased sales for reasons of efficiency, GAMA expects the total (gas, oil, and electric) central furnace market to increase by 16% in 1983.

1983-04-04T23:59:59.000Z

267

Cupola Furnace Computer Process Model  

Science Conference Proceedings (OSTI)

The cupola furnace generates more than 50% of the liquid iron used to produce the 9+ million tons of castings annually. The cupola converts iron and steel into cast iron. The main advantages of the cupola furnace are lower energy costs than those of competing furnaces (electric) and the ability to melt less expensive metallic scrap than the competing furnaces. However the chemical and physical processes that take place in the cupola furnace are highly complex making it difficult to operate the furnace in optimal fashion. The results are low energy efficiency and poor recovery of important and expensive alloy elements due to oxidation. Between 1990 and 2004 under the auspices of the Department of Energy, the American Foundry Society and General Motors Corp. a computer simulation of the cupola furnace was developed that accurately describes the complex behavior of the furnace. When provided with the furnace input conditions the model provides accurate values of the output conditions in a matter of seconds. It also provides key diagnostics. Using clues from the diagnostics a trained specialist can infer changes in the operation that will move the system toward higher efficiency. Repeating the process in an iterative fashion leads to near optimum operating conditions with just a few iterations. More advanced uses of the program have been examined. The program is currently being combined with an ''Expert System'' to permit optimization in real time. The program has been combined with ''neural network'' programs to affect very easy scanning of a wide range of furnace operation. Rudimentary efforts were successfully made to operate the furnace using a computer. References to these more advanced systems will be found in the ''Cupola Handbook''. Chapter 27, American Foundry Society, Des Plaines, IL (1999).

Seymour Katz

2004-12-31T23:59:59.000Z

268

DOE/EA-1673: Environmental Assessment for Energy Conservation Program for Certain Industrial Equipment: Energy Conservation Standards and Test Procedures for Commercial Heating, Air-Conditioning, and Water-Heating Equipment (July 2009)  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

3 3 Environmental Assessment for 10 CFR 431 Energy Conservation Program for Certain Industrial Equipment: Energy Conservation Standards and Test Procedures for Commercial Heating, Air- Conditioning, and Water-Heating Equipment July 2009 8-i CHAPTER 8. ENVIRONMENTAL ASSESSMENT TABLE OF CONTENTS 8.1 INTRODUCTION ............................................................................................................... 8-1 8.2 AIR QUALITY ANALYSIS ............................................................................................... 8-1 8.3 AIR POLLUTANT DESCRIPTIONS ................................................................................ 8-1 8.4 AIR QUALITY REGULATIONS ...................................................................................... 8-3

269

Proposal for the award of a contract for the design, supply, installation and commissioning of Heating, Ventilation and Air-Conditioning (HVAC) systems for the PS accelerator infrastructure  

E-Print Network (OSTI)

Proposal for the award of a contract for the design, supply, installation and commissioning of Heating, Ventilation and Air-Conditioning (HVAC) systems for the PS accelerator infrastructure

2012-01-01T23:59:59.000Z

270

Proposal for the award of a contract for dismantling, removal and packaging of the existing Heating, Ventilation and Air-Conditioning (HVAC) systems in the PS tunnel  

E-Print Network (OSTI)

Proposal for the award of a contract for dismantling, removal and packaging of the existing Heating, Ventilation and Air-Conditioning (HVAC) systems in the PS tunnel

2012-01-01T23:59:59.000Z

271

Comparative performance of solar heating with air and liquid systems. Interim progress report, February 1, 1976--August 30, 1976  

SciTech Connect

A performance comparison between an air solar system and a liquid solar system for space heating under nearly equal conditions has been obtained. The Colorado State University Solar House I is a liquid solar system which has been in operation since August 1974. Solar House II, which stands adjacent to and has a comparable heating load to Solar House I, is equipped with an air solar system. Solar House I has been continuously monitored since August 1974 and Solar House II has been monitored since February 1976. Performance of the solar systems is reported in terms of the collector efficiency, the amount of space heating and service water heating load provided by solar energy, and the use of electrical energy to operate the solar equipment. General characteristics of the two types of systems are also compared. Information concerning installation, operation, and maintenance of the systems have been documented and are discussed.

Karaki, S.; Lof, G.O.G.; Smith, C.C.

1976-08-01T23:59:59.000Z

272

Reduce Radiation Losses from Heating Equipment  

Science Conference Proceedings (OSTI)

This DOE Industrial Technologies Program tip sheet describes how to save energy and costs by reducing expensive heat losses from industrial heating equipment, such as furnaces.

Not Available

2006-01-01T23:59:59.000Z

273

Research and design work on heat emission and aerodynamic resistance of tube bundles in air cooling equipment  

SciTech Connect

Results of studies of heat emission using methods of local and global thermal simulation of crossflow small-array bundles of tubes finned with wound aluminum strip, and flared into the load-bearing wall, are reported. Correction factors applicable to the method of simulating convective heat transfer over the range Re = (2.5-25).10/sup 3/ are given, with variation in the number of rows over the air course from one to four.

Kuntysh, V.B.; Fedotova, L.M.

1983-01-01T23:59:59.000Z

274

Modelica Library for Building Heating, Ventilation and Air-Conditioning Systems  

DOE Green Energy (OSTI)

This paper presents a freely available Modelica library for building heating, ventilation and air conditioning systems. The library is based on the Modelica.Fluid library. It has been developed to support research and development of integrated building energy and control systems. The primary applications are controls design, energy analysis and model-based operation. The library contains dynamic and steady-state component models that are applicable for analyzing fast transients when designing control algorithms and for conducting annual simulations when assessing energy performance. For most models, dimensional analysis is used to compute the performance for operating points that differ from nominal conditions. This allows parameterizing models in the absence of detailed geometrical information which is often impractical to obtain during the conceptual design phase of building systems. In the first part of this paper, the library architecture and the main classes are described. In the second part, an example is presented in which we implemented a model of a hydronic heating system with thermostatic radiator valves and thermal energy storage.

Wetter, Michael

2009-06-17T23:59:59.000Z

275

Energy Basics: Heat Pump Systems  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Systems Air-Source Heat Pumps Ductless Mini-Split Heat Pumps Absorption Heat Pumps Geothermal Heat Pumps Supporting Equipment for Heating & Cooling Systems Water Heating Heat...

276

Regenerative Burners Assessment in Holding Reverberatory Furnace  

Science Conference Proceedings (OSTI)

The assessment showed that the regenerative burner furnaces are not profitable in saving energy in addition to the negative impact on the furnace life.

277

Microsoft Word - ACEEE_06_FurnaceBlower_Paper413_lbl.doc  

NLE Websites -- All DOE Office Websites (Extended Search)

BPM Motors in Residential Gas Furnaces: What are the Savings? BPM Motors in Residential Gas Furnaces: What are the Savings? James Lutz, Victor Franco, Alex Lekov, and Gabrielle Wong-Parodi Lawrence Berkeley National Laboratory, Berkeley, California ABSTRACT Residential gas furnaces contain blowers to distribute warm air. Currently, furnace blowers use either a Permanent Split Capacitor (PSC) or a Brushless Permanent Magnet (BPM) motor. Blowers account for the majority of furnace electricity consumption. Therefore, accurate determination of the blower electricity consumption is important for understanding electricity consumption of furnaces. The electricity consumption of blower motors depends on the static pressure across the blower. This paper examines both types of blower motors in non-condensing non-weatherized

278

Duct Systems in large commercial buildings: Physical characterization, air leakage, and heat conduction gains  

E-Print Network (OSTI)

A variety of methods of sealing supply-air registers wereand sealing practices when leakage at connections to duct-mounted equipment is not considered. The measured air-

Fisk, W.J.

2011-01-01T23:59:59.000Z

279

Energy Star Building Upgrade Manual Heating and Cooling  

NLE Websites -- All DOE Office Websites (Extended Search)

9. Heating and 9. Heating and Cooling Revised January 2008 9.1 Overview 2 9.2 Central Cooling Systems 3 Chiller Plant Operations and Maintenance 4 Chiller Plant Retrofits 6 9.3 Central Heating Systems 10 Boiler System Operations and Maintenance 11 Boiler System Retrofits 11 Improving Furnace Efficiency 13 9.4 Unitary Systems 14 Packaged Rooftop Units 16 Split-System Packaged Units 18 Air-Source Heat Pumps 18 Ground-Source, Closed-Loop Heat Pumps 19 9.5 Additional Strategies 20 Air-Side Economizer 20 Energy Recovery 20 Desiccant Dehumidification 20 Night Precooling 21 Cool Storage 22 Evaporative Cooling 22 9.6 Summary 22 Bibliography 23 Glossary G-1 1 ENERGY STAR ® Building Manual ENERGY STAR ® Building Manual 9. Heating and Cooling 9.1 Overview Although heating and cooling systems provide a useful service by keeping occupants comfort-

280

Improving air handler efficiency in houses  

SciTech Connect

Although furnaces, air conditioners and heat pumps have become significantly more efficient over the last couple of decades, residential air handlers have typical efficiencies of only 10% to 15% due to poor electric motor performance and aerodynamically poor fans and fan housings. Substantial increases in performance could be obtained through improved air handler design and construction. A prototype residential air handler intended to address these issues has recently been developed. The prototype and a standard production fan were tested in a full-scale duct system and test chamber at LBNL specifically designed for testing heating, ventilation, and air conditioning systems. The laboratory tests compared efficiency, total airflow, sensitivity to duct system flow resistance, and the effects of installation in a smaller cabinet. The test results showed that the prototype air handler had about twice the efficiency of the standard air handler (averaged over a wide range of operating conditions) and was less sensitive to duct system flow resistance changes. The performance of both air handlers was significantly reduced by reducing the clearance between the air handler and cabinet it was placed in. These test results showed that in addition to the large scope for performance improvement, air handler fans need to be tested in the cabinets they operate in.

Walker, Iain S.

2004-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "furnaces heat air" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Forced convective flow and heat transfer of upward cocurrent air-water slug flow in vertical plain and swirl tubes  

SciTech Connect

This experimental study comparatively examined the two-phase flow structures, pressured drops and heat transfer performances for the cocurrent air-water slug flows in the vertical tubes with and without the spiky twisted tape insert. The two-phase flow structures in the plain and swirl tubes were imaged using the computerized high frame-rate videography with the Taylor bubble velocity measured. Superficial liquid Reynolds number (Re{sub L}) and air-to-water mass flow ratio (AW), which were respectively in the ranges of 4000-10000 and 0.003-0.02 were selected as the controlling parameters to specify the flow condition and derive the heat transfer correlations. Tube-wise averaged void fraction and Taylor bubble velocity were well correlated by the modified drift flux models for both plain and swirl tubes at the slug flow condition. A set of selected data obtained from the plain and swirl tubes was comparatively examined to highlight the impacts of the spiky twisted tape on the air-water interfacial structure and the pressure drop and heat transfer performances. Empirical heat transfer correlations that permitted the evaluation of individual and interdependent Re{sub L} and AW impacts on heat transfer in the developed flow regions of the plain and swirl tubes at the slug flow condition were derived. (author)

Chang, Shyy Woei [Thermal Fluids Laboratory, National Kaohsiung Marine University, No. 142, Haijhuan Road, Nanzih District, Kaohsiung City 81143 (China); Yang, Tsun Lirng [Department of Marine Engineering, National Kaohsiung Marine University, No. 142, Haijhuan Road, Nanzih District, Kaohsiung City 81143 (China)

2009-10-15T23:59:59.000Z

282

Post combustion trials at Dofasco's KOBM furnace  

DOE Green Energy (OSTI)

Post combustion trials were conducted at Dofasco's 300 tonne KOBM furnace as part of the AISI Direct Steelmaking Program. The purpose of the project work was to measure the post combustion ratio (PCR) and heat transfer efficiency (HTE) of the post combustion reaction in a full size steelmaking vessel. A method of calculating PCR and HTE using off gas analysis and gas temperature was developed. The PCR and HTE were determined under normal operating conditions. Trials assessed the effect of lance height, vessel volume, foaming slag and pellet additions on PCR and HTE.

Farrand, B.L.; Wood, J.E.; Goetz, F.J.

1992-01-01T23:59:59.000Z

283

Global warming impacts of ozone-safe refrigerants and refrigeration, heating, and air-conditioning technologies  

SciTech Connect

International agreements mandate the phase-out of many chlorine containing compounds that are used as the working fluid in refrigeration, air-conditioning, and heating equipment. Many of the chemical compounds that have been proposed, and are being used in place of the class of refrigerants eliminated by the Montreal Protocol are now being questioned because of their possible contributions to global warming. Natural refrigerants are put forth as inherently superior to manufactured refrigerants because they have very low or zero global warming potentials (GWPs). Questions are being raised about whether or not these manufactured refrigerants, primarily hydrofluorocarbons (HFCs), should be regulated and perhaps phased out in much the same manner as CFCs and HCFCs. Several of the major applications of refrigerants are examined in this paper and the results of an analysis of their contributions to greenhouse warming are presented. Supermarket refrigeration is shown to be an application where alternative technologies have the potential to reduce emissions of greenhouse gases (GHG) significantly with no clear advantage to either natural or HFC refrigerants. Mixed results are presented for automobile air conditioners with opportunities to reduce GHG emissions dependent on climate and comfort criteria. GHG emissions for hermetic and factory built systems (i.e. household refrigerators/freezers, unitary equipment, chillers) are shown to be dominated by energy use with much greater potential for reduction through efficiency improvements than by selection of refrigerant. The results for refrigerators also illustrate that hydrocarbon and carbon dioxide blown foam insulation have lower overall effects on GHG emissions than HFC blown foams at the cost of increased energy use.

Fischer, S.; Sand, J.; Baxter, V.

1997-12-01T23:59:59.000Z

284

An Investigation of Alternative Methods for Measuring Static Pressure of Unitary Air Conditioners and Heat Pumps  

E-Print Network (OSTI)

This project was created to address an important issue currently faced by test facilities measuring static pressure for air-conditioning and heat pumps. Specifically, ASHRAE Standard 37, the industry standard for test setup, requires an outlet duct of a certain length, based on the unit outlet geometry, and this ducting added to the unit height may result in a test apparatus height that exceeds psychometric test room dimensions. This project attempted to alter the outlet duct in a way that reduces the test apparatus height while maintaining the reliability of the ASHRAE Standard 37 testing setup. The investigation was done in two scenarios, the first, which altered the direction of the flow after the unit with an elbow and measured static pressure downstream of the elbow, and the second which inserted a passive resistive piece in the flow to decrease the required distance between the unit and the static pressure measurement. Three air handling units were used in Scenario 1 and Scenario 2 testing, with the two smallest units additionally being tested in Scenario 1 with an over-sized duct. The scenario tests were required to be within 5% power and 2.5% airflow of a baseline test following ASHRAE Standard 37. he results for Scenario 1 have shown that ASHRAE Standard 37 can be modified to reduce testing height restrictions by using a square elbow with turning vanes, provided it is oriented in a specific way in relation to the blower. Furthermore, additional Scenario 1 testing on the over-sized outlet duct shows that possibilities exist for using a single over-sized duct to successfully meet ASHRAE Standard 37 testing conditions when testing a variety of units. Finally, the results of Scenario 2 have shown that the height constraints of the outlet duct can be reduced by installing a passive resistive device consisting of a mesh at the outlet; however, this approach applies only to those units with the heat exchanger located downstream of the blower. As a result of specific issues or problems that were encountered during the project that were beyond the scope, eleven case studies were presented and recommended for future work.

Wheeler, Grant Benson

2013-08-01T23:59:59.000Z

285

A multi-objective evolutionary algorithm for an effective tuning of fuzzy logic controllers in heating, ventilating and air conditioning systems  

Science Conference Proceedings (OSTI)

This paper focuses on the use of multi-objective evolutionary algorithms to develop smartly tuned fuzzy logic controllers dedicated to the control of heating, ventilating and air conditioning systems, energy performance, stability and indoor comfort ... Keywords: Fuzzy logic controllers, Genetic tuning, HVAC systems, Heating, ventilating, and air conditioning systems, Linguistic 2-tuples representation, Multi-objective evolutionary algorithms, Rule selection

María José Gacto; Rafael Alcalá; Francisco Herrera

2012-03-01T23:59:59.000Z

286

AN EXPERIMENTAL INVESTIGATION ON HEAT TRANSFER CHARACTERISTICS OF AIR AND CO2 IN MICROTUBES  

E-Print Network (OSTI)

by a cooling capacity, which is delivered in those rooms by heat exchangers where a heat transfer fluid - 2 and Fluid Science, 1-3:17. Mortada S., 2010. "Heat transfer performance of a mini-channel evaporator are mini-channel heat exchangers (MCHE) combining high heat transfer coefficients and low refrigerant

Kandlikar, Satish

287

Preheated Combustion Air (International Fact Sheet), Energy Tips-Process Heating, Process Heating Tip Sheet #1c  

Science Conference Proceedings (OSTI)

This English/Chinese international tip sheet provides information for optimizing industrial process heating systems and includes measurements in metric units.

Not Available

2010-10-01T23:59:59.000Z

288

Check Burner Air to Fuel Ratios (International Fact Sheet), Energy Tips-Process Heating, Process Heating Tip Sheet #2c  

Science Conference Proceedings (OSTI)

This English/Chinese international tip sheet provides information for optimizing efficiency of industrial process heating systems and includes measurements in metric units.

Not Available

2010-10-01T23:59:59.000Z

289

Heat pipe cooling of metallurgical furnace equipment.  

E-Print Network (OSTI)

??Current water-cooling technology used in the metallurgical industry poses a major safety concern. In addition, these systems are expensive to operate and result in significant… (more)

Navarra, Pietro, 1979-

2006-01-01T23:59:59.000Z

290

Buildings Energy Data Book: 5.3 Heating, Cooling, and Ventilation Equipment  

Buildings Energy Data Book (EERE)

2 2 Main Commercial Heating and Cooling Equipment as of 1995, 1999, and 2003 (Percent of Total Floorspace) (1) Heating Equipment 1995 1999 2003 (2) Cooling Equipment 1995 1999 2003 (2) Packaged Heating Units 29% 38% 28% Packaged Air Conditioning Units 45% 54% 46% Boilers 29% 29% 32% Individual Air Conditioners 21% 21% 19% Individual Space Heaters 29% 26% 19% Central Chillers 19% 19% 18% Furnaces 25% 21% 30% Residential Central Air Conditioners 16% 12% 17% Heat Pumps 10% 13% 14% Heat Pumps 12% 14% 14% District Heat 10% 8% 8% District Chilled Water 4% 4% 4% Other 11% 6% 5% Swamp Coolers 4% 3% 2% Other 2% 2% 2% Note(s): Source(s): 1) Heating and cooling equipment percentages of floorspace total more than 100% since equipment shares floorspace. 2) Malls are no longer included in most CBECs tables; therefore, some data is not directly comparable to past CBECs.

291

What Steps Do You Take to Maintain Your Furnace? | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Steps Do You Take to Maintain Your Furnace? Steps Do You Take to Maintain Your Furnace? What Steps Do You Take to Maintain Your Furnace? January 7, 2010 - 7:30am Addthis This week, Chris told you about his plans to maintain his furnace to keep it running efficiently. Proper maintenance is key to ensuring your heating and cooling systems are in working order. No one wants to wake up on the coldest day of the year to find that they have no heat! What steps do you take to maintain your furnace? Each Thursday, you have the chance to share your thoughts on a question about energy efficiency or renewable energy for consumers. E-mail your responses to the Energy Saver team at consumer.webmaster@nrel.gov. Addthis Related Articles Brrrrr. It's Cold In There! Saving Energy and Money Starts at Home 31,000 Homes Weatherized in June

292

Adaptation to space applications of a 2000 c furnace with oxidizing atmosphere  

SciTech Connect

The possibility of using a low weight low power consumption furnace with oxidizing atmosphere at 2000 C for space applications is discussed. The main heating element is made of zirconium oxide with a platinum preheating system. The structure and stabilization of zirconium oxide are detailed together with its application to the space situation. The static and dynamic regimes are discussed with regard to measurement of the resistivity as a function of temperature and dynamic model. The temperature distribution in the furnace and in a main heating element were studied in relation to thermal insulation and weight budget. A model is proposed for optimal control and thermostat using analog simulation. The final concept requires 350 W for an isothermal furnace of 20 mm diameter weighing 3 kg. The cases of temperature gradient furnaces and of universal furnaces are reviewed. (GRA)

1975-01-01T23:59:59.000Z

293

Variable frequency microwave furnace system  

DOE Patents (OSTI)

A variable frequency microwave furnace system designed to allow modulation of the frequency of the microwaves introduced into a furnace cavity for testing or other selected applications. The variable frequency microwave furnace system includes a microwave signal generator or microwave voltage-controlled oscillator for generating a low-power microwave signal for input to the microwave furnace. A first amplifier may be provided to amplify the magnitude of the signal output from the microwave signal generator or the microwave voltage-controlled oscillator. A second amplifier is provided for processing the signal output by the first amplifier. The second amplifier outputs the microwave signal input to the furnace cavity. In the preferred embodiment, the second amplifier is a traveling-wave tube (TWT). A power supply is provided for operation of the second amplifier. A directional coupler is provided for detecting the direction of a signal and further directing the signal depending on the detected direction. A first power meter is provided for measuring the power delivered to the microwave furnace. A second power meter detects the magnitude of reflected power. Reflected power is dissipated in the reflected power load. 5 figs.

Bible, D.W.; Lauf, R.J.

1994-06-14T23:59:59.000Z

294

Refinery Furnaces Retrofit with Gas Turbines Achieve Both Energy Savings and Emission Reductions  

E-Print Network (OSTI)

Integrating gas turbines with refinery furnaces can be a cost effective means of reducing NOx emissions while also generating electricity at an attractive heat rate. Design considerations and system costs are presented.

Giacobbe, F.; Iaquaniello, G.; Minet, R. G.; Pietrogrande, P.

1985-05-01T23:59:59.000Z

295

Residential Bulk-Fed Wood-Pellet Central Boilers and Furnace Rebate Program  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Residential Bulk-Fed Wood-Pellet Central Boilers and Furnace Rebate Residential Bulk-Fed Wood-Pellet Central Boilers and Furnace Rebate Program Residential Bulk-Fed Wood-Pellet Central Boilers and Furnace Rebate Program < Back Eligibility Multi-Family Residential Residential Savings Category Heating & Cooling Commercial Heating & Cooling Heating Maximum Rebate $6,000 Program Info Funding Source New Hampshire Renewable Energy Fund (FY 2013) Start Date 04/14/2010 Expiration Date When progr State New Hampshire Program Type State Rebate Program Rebate Amount 30% Provider New Hampshire Public Utilities Commission The New Hampshire Public Utilities Commission (PUC) is offering rebates of 30% of the installed cost of qualifying new residential bulk-fed, wood-pellet central heating boilers or furnaces. The maximum rebate is $6,000. To qualify, systems must (1) become operational on or after May 1,

296

Biomass Boiler and Furnace Emissions and Safety Regulations in the  

Open Energy Info (EERE)

Biomass Boiler and Furnace Emissions and Safety Regulations in the Biomass Boiler and Furnace Emissions and Safety Regulations in the Northeast States Jump to: navigation, search Tool Summary Name: Biomass Boiler and Furnace Emissions and Safety Regulations in the Northeast States Agency/Company /Organization: CONEG Policy Research Center Inc. Partner: Massachusetts Department of Energy Resources, Rick Handley and Associates, Northeast States for Coordinated Air Use Management (NESCAUM) Sector: Energy Focus Area: Biomass, - Biomass Combustion, - Biomass Gasification, - Biomass Pyrolysis, - Biofuels, Economic Development Phase: Determine Baseline, Evaluate Options, Develop Goals Resource Type: Guide/manual User Interface: Other Website: www.mass.gov/Eoeea/docs/doer/renewables/biomass/DOER%20Biomass%20Emiss Country: United States

297

Amazing furnace-free house  

Science Conference Proceedings (OSTI)

A new 24,450 ft/sub 2/ house is described which has the following features: (1) 100% solar heating in a 6500 degree-day climate; (2) a greenhouse which never drops below 32/sup 0/F; (3) steady fresh air inflow; (4) building costs comparable to conventional homes of the same size; (5) roof solar collector and high temperature attic thermal storage; (6) a Solar Staircase which controls seasonal insolation; (7) a rock bin (100 ton) for low temperature storage; and (8) durability with low maintenance. The design features necessary to obtain the above criteria are discussed as well as the operation of the house for winter and summer use. An air moving system (fan plus ducts) is an essential part of the house. (MJJ)

Shurcliff, W.A.

1982-11-01T23:59:59.000Z

298

Estimation of Sensible and Latent Heat Fluxes from Soil Surface Temperature Using a Linear Air-Land Heat Transfer Model  

Science Conference Proceedings (OSTI)

The authors present a linearized model of the heat transfer between the soil layer and the atmosphere. Using this model, the moisture availability at the surface can be estimated from the diurnal variations of the soil surface temperature and ...

Fujio Kimura; Yugo Shimizu

1994-04-01T23:59:59.000Z

299

Effect of refrigerant charge, duct leakage, and evaporator air flow on the high temerature performance of air conditioners and heat pumps  

E-Print Network (OSTI)

An experimental study was conducted to quantify the effect of several installation items on the high outdoor ambient temperature performance of air conditioners. These installation items were: improper amount of refrigerant charge, reduced evaporator airflow, and return air leakage from hot attic spaces. There were five sets of tests used for this research: two of them for the charging tests, two for the reduced evaporator airflow, and one for the return air leakage tests. For the charging tests, the indoor room conditions were 80'F (27.8'C) dry-bulb and 50% relative humidity. The outdoor conditions ranged from 95'F (350C) all the way up to 120'F (48.9'C). Charge levels ranged from 30% undercharged to 40% overcharged for the short-tube orifice unit. For the thermal expansion valve (TXV) unit, charge levels ranged from-36% charging to +27% charging. Performance was quantified with the following variables: total capacity, energy efficiency ratio (EER), and power. The performance of the orifice unit was more sensitive to charge than it was for the TXV unit. For the TXV unit on the -27% to +27% charging range, the capacity and EER changed little with charge. A TXV unit and a short-tube orifice unit were also tested for reduced evaporator airflow. As evaporator airflow decreased, the capacity and EER both decreased as expected. However, the drop was not as significant as with the charging tests. For the extreme case of 50% reduced evaporator airflow, neither unit's capacity or EER dropped more than 25%. Return air leakage from hot attic spaces was simulated by assuming adiabatic mixing of the indoor air at normal conditions with the attic air at high temperatures. Effective capacity and EER both decreased with increased return air leakage. However, power consumption was relatively constant for all variables except outdoor temperature, which meant that for the same power consumption, the unit delivered much lower performance when there was return air leakage. The increase in sensible heat ratio (SHR) with increasing leakage showed perhaps the most detrimental effect of return air leakage on performance, which was the inability of the unit to absorb moisture from the environment.

Rodriguez, Angel Gerardo

1995-01-01T23:59:59.000Z

300

Effect of Refrigerant Charge, Duct Leakage, and Evaporator Air Flow on the High Temperature Performance of Air Conditioners and Heat Pumps  

E-Print Network (OSTI)

An experimental study was conducted to quantify the effect of several installation items on the high outdoor ambient temperature performance of air conditioners. These installation items were: improper amount of refrigerant charge, reduced evaporator airflow, and return air leakage from hot attic spaces. There were five sets of tests used for this research: two of them for the charging tests, two for the reduced evaporator airflow, and one for the return air leakage tests. For the charging tests, the indoor room conditions were 80°F (27.8°C) dry-bulb and 50% relative humidity. The outdoor conditions ranged from 95°F (35°C) all the way up to 120°F (48.9°C). Charge levels ranged from 30% undercharged to 40% overcharged for the short-tube orifice unit. For the thermal expansion valve (TXV) unit, charge levels ranged from -36% charging to +27% charging. Performance was quantified with the following variables: total capacity, energy efficiency ratio (EER), and power. The performance of the orifice unit was more sensitive to charge than it was for the TXV unit. For the TXV unit on the -27% to +27% charging range, the capacity and EER changed little with charge. A TXV unit and a short-tube orifice unit were also tested for reduced evaporator airflow. As evaporator airflow decreased, the capacity and EER both decreased as expected. However, the drop was not as significant as with the charging tests. For the extreme case of 50% reduced evaporator airflow, neither unit's capacity or EER dropped more than 25%. Return air leakage from hot attic spaces was simulated by assuming adiabatic mixing of the indoor air at normal conditions with the attic air at high temperatures. Effective capacity and EER both decreased with increased return air leakage. However, power consumption was relatively constant for all variables except outdoor temperature, which meant that for the same power consumption, the unit delivered much lower performance when there was return air leakage. The increase in sensible heat ratio (SHR) with increasing leakage showed perhaps the most detrimental effect of return air leakage on performance, which was the inability of the unit to absorb moisture from the environment.

Rodriguez, Angel Gerardo

2007-11-29T23:59:59.000Z

Note: This page contains sample records for the topic "furnaces heat air" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Energy Basics: Absorption Heat Pumps  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Systems Air-Source Heat Pumps Ductless Mini-Split Heat Pumps Absorption Heat Pumps Geothermal Heat Pumps Supporting Equipment for Heating & Cooling Systems Water Heating...

302

Energy Basics: Geothermal Heat Pumps  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Systems Air-Source Heat Pumps Ductless Mini-Split Heat Pumps Absorption Heat Pumps Geothermal Heat Pumps Supporting Equipment for Heating & Cooling Systems Water Heating...

303

Energy Consumption Simulation and Analysis of Heat Pump Air Conditioning System in Wuhan by the BIN Method  

E-Print Network (OSTI)

Based on the weather data of a standard year in Wuhan, derived from the data of the latest 15 years, the data for the BIN (temperature and humidity frequency) method of an annual and 8-hour system were calculated. Then the BIN method was adopted to simulate the annual energy consumption of groundwater heat pump systems (GWHPS) for an office building in Wuhan. Its annual energy consumption was obtained and compared with the partner of the air source heat pump systems (ASHPS). The results show that the energy consumption of the former was approximately less 23.3% than that of the latter in summer and 19.1% in winter.

Wen, Y.; Zhao, F.

2006-01-01T23:59:59.000Z

304

List of Heat recovery Incentives | Open Energy Information  

Open Energy Info (EERE)

recovery Incentives recovery Incentives Jump to: navigation, search The following contains the list of 174 Heat recovery Incentives. CSV (rows 1 - 174) Incentive Incentive Type Place Applicable Sector Eligible Technologies Active AEP Ohio - Commercial Custom Project Rebate Program (Ohio) Utility Rebate Program Ohio Commercial Fed. Government Industrial Institutional Local Government Nonprofit Schools State Government Tribal Government Boilers Central Air conditioners Chillers Custom/Others pending approval Furnaces Heat pumps Heat recovery Lighting Lighting Controls/Sensors Processing and Manufacturing Equipment Refrigerators Yes AEP Ohio - Commercial Self Direct Rebate Program (Ohio) Utility Rebate Program Ohio Commercial Fed. Government Industrial Institutional Local Government

305

Cowlitz County PUD - H2 AdvantagePlus Residential Heat Pump Program |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Cowlitz County PUD - H2 AdvantagePlus Residential Heat Pump Program Cowlitz County PUD - H2 AdvantagePlus Residential Heat Pump Program Cowlitz County PUD - H2 AdvantagePlus Residential Heat Pump Program < Back Eligibility Residential Savings Category Heating & Cooling Commercial Heating & Cooling Heat Pumps Program Info State District of Columbia Program Type Utility Rebate Program Rebate Amount Heat Pumps: $450 - $1,800 Conversion from Electric Forced Air Furnace: $1,400 - $1,900 Duct Sealing: $50 - $350 Heat Pump Controls: $300 Provider Cowlitz County Public Utility District Cowlitz County PUD will provide rebates to customer homeowners who have a PUD-qualified heat pump dealer upgrade their heating system with the installation of a premium efficiency heat pump system, in accordance with the PUD's rigid set of installation standards, and who upgrade their

306

Large HVAC Codes and Standards Update 2000: American Society of Heating, Refrigerating and Air-Conditioning Engineers  

Science Conference Proceedings (OSTI)

This report documents EPRI activities in the year 2000 related to building codes and standards. The following activities are covered: attendance at the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) meetings and participation in technical committee and subcommittee meetings related to ASHRAE Standard 90.l; review of relevant U.S Department of Energy (DOE) appliance standards; review of developments of other building energy code organizations; and participation in the E...

2000-12-13T23:59:59.000Z

307

Development of a high-performance coal-fired power generating system with pyrolysis gas and char-fired high temperature furnace (HITAF). Quarterly progress report No. 3, July--September 1992  

SciTech Connect

A concept for an advanced coal-fired combined-cycle power generating system is currently being developed. The first phase of this three-phase program consists of conducting the necessary research and development to define the system, evaluate the economic and technical feasibility of the concept, and prepare an R & D plan to develop the concept further. Foster Wheeler Development Corporation is leading a team ofcompanies involved in this effort. The system proposed to meet these goals is a combined-cycle system where air for a gas turbine is indirectly heated to approximately 1800{degrees}F in furnaces fired with cool-derived fuels and then directly heated in a natural-gas-fired combustor up to about 2400{degrees}F. The system is based on a pyrolyzing process that converts the coal into a low-Btu fuel gas and char. The fuelgas is a relatively clean fuel, and it is fired to heat tube surfaces that are susceptible to corrosion and problems from ash deposition. In particular, the high-temperature air heater tubes, which will need tobe a ceramic material, will be located in a separate furnace or region of a furnace that is exposed to combustion products from the low-Btu fuel gas only. A simplified process flow diagram is shown.

Not Available

1992-11-01T23:59:59.000Z

308

Probability Distribution Characteristics for Surface Air–Sea Turbulent Heat Fluxes over the Global Ocean  

Science Conference Proceedings (OSTI)

To analyze the probability density distributions of surface turbulent heat fluxes, the authors apply the two-parametric modified Fisher–Tippett (MFT) distribution to the sensible and latent turbulent heat fluxes recomputed from 6-hourly NCEP–NCAR ...

Sergey K. Gulev; Konstantin Belyaev

2012-01-01T23:59:59.000Z

309

Development of an air-cooled, loop-type heat pipe with multiple condensers  

E-Print Network (OSTI)

Thermal management challenges are prevalent in various applications ranging from consumer electronics to high performance computing systems. Heat pipes are capillary-pumped devices that take advantage of the latent heat ...

Kariya, H. Arthur (Harumichi Arthur)

2012-01-01T23:59:59.000Z

310

Performance evaluation of a solar air-heating and nocturnal cooling system in CSU Solar House II. Final report, June 1, 1977-September 30, 1978  

DOE Green Energy (OSTI)

The solar heating system in Solar House II consists of 67.1 m/sup 2/ of double-glazed air-heating collectors with flat-black absorbers, 10.3 m/sup 3/ of pebble bed storage, air-to-water heat exchanger for preheating domestic water and one blower to circulate the air through the system. The nocturnal cooling system consists of an evaporative cooler and utilizes the pebble bed for cool storage. A schematic diagram of the system is shown.

Karaki, S.

1979-04-01T23:59:59.000Z

311

Energy Saving Potentials and Air Quality Benefits of Urban Heat IslandMitigation  

E-Print Network (OSTI)

Solar Absorptance, Attic, and Duct Insulation on Cooling and Heating Energy Use in Single-Family New Residential Buildings,”

Akbari, Hashem

2005-01-01T23:59:59.000Z

312

Opportunities for Saving Energy and Improving Air Quality in Urban Heat Islands  

E-Print Network (OSTI)

Solar Absorptance, Attic, and Duct Insulation on Cooling and Heating Energy Use in Single-Family New Residential Buildings,”

Akbari, Hashem

2008-01-01T23:59:59.000Z

313

Acoustical prediction methods for heating, ventilating, and air?conditioning (HVAC) systems  

Science Conference Proceedings (OSTI)

The goal of this project is to compare and contrast various aspects of acoustical prediction methods for heating

2005-01-01T23:59:59.000Z

314

Furnace Blower Electricity: National and Regional Savings Potential  

E-Print Network (OSTI)

Inc. Pigg, Scott. 2003. Electricity Use by New Furnaces: Astage furnaces offer national electricity savings, but withABORATORY Furnace Blower Electricity: National and Regional

Franco, Victor; Florida Solar Energy Center

2008-01-01T23:59:59.000Z

315

Residential Two-Stage Gas Furnaces - Do They Save Energy?  

E-Print Network (OSTI)

Method for Measuring the Energy Consumption of Furnaces andcalculating the energy consumption of two-stage furnaces.residential gas furnace energy consumption in the DOE test

Lekov, Alex; Franco, Victor; Lutz, James

2006-01-01T23:59:59.000Z

316

Measure Guideline: Combination Forced-Air Space and Tankless Domestic Hot Water Heating Systems  

SciTech Connect

This document describes design and application guidance for combination space and tankless domestic hot water heating systems (combination systems) used in residential buildings, based on field evaluation, testing, and industry meetings conducted by Building Science Corporation. As residential building enclosure improvements continue to drive heating loads down, using the same water heating equipment for both space heating and domestic water heating becomes attractive from an initial cost and space-saving perspective. This topic is applicable to single- and multi-family residential buildings, both new and retrofitted.

Rudd, A.

2012-08-01T23:59:59.000Z

317

BPM Motors in Residential Gas Furnaces: What are theSavings?  

Science Conference Proceedings (OSTI)

Residential gas furnaces contain blowers to distribute warm air. Currently, furnace blowers use either a Permanent Split Capacitor (PSC) or a Brushless Permanent Magnet (BPM) motor. Blowers account for the majority of furnace electricity consumption. Therefore, accurate determination of the blower electricity consumption is important for understanding electricity consumption of furnaces. The electricity consumption of blower motors depends on the static pressure across the blower. This paper examines both types of blower motors in non-condensing non-weatherized gas furnaces at a range of static pressures. Fan performance data is based on manufacturer product literature and laboratory tests. We use field-measured static pressure in ducts to get typical system curves to calculate how furnaces would operate in the field. We contrast this with the electricity consumption of a furnace blower operating under the DOE test procedure and manufacturer rated conditions. Furnace electricity use is also affected by operating modes that happen at the beginning and end of each furnace firing cycle. These operating modes are the pre-purge and post-purge by the draft inducer, the on-delay and off-delay of the blower, and the hot surface ignitor operation. To accurately calculate this effect, we use the number of firing cycles in a typical California house in the Central Valley of California. Cooling hours are not considered in the DOE test procedure. We also account for furnace blower use by the air conditioner and stand-by power. Overall BPM motors outperform PSC motors, but the total electricity savings are significantly less than projected using the DOE test procedure conditions. The performance gains depend on the static pressure of the household ducts, which are typically much higher than in the test procedures.

Lutz, James; Franco, Victor; Lekov, Alex; Wong-Parodi, Gabrielle

2006-05-12T23:59:59.000Z

318

Modeled and measured effects of compressor downsizing in an existing air conditioner/heat pump in the cooling mode  

SciTech Connect

It is not uncommon to find oversized central air conditioners in residences. HVAC contractors sometimes oversize central air conditioners for one reason or another--some to the point that they may be 100% larger than needed to meet the load. Retrofit measures done to improve house envelope and distribution system efficiency also contribute to HVAC oversizing, as they reduce house heating and cooling loads. Proper sizing of an air conditioner or heat pump allows more efficient operation and provides a more comfortable environment than a highly oversized unit. Another factor that lowers operating efficiency is an improper refrigerant charge. Field inspections have revealed that about half of the units checked were not properly charged. An option available to homeowners with oversized air conditioners is to replace the existing compressor with a smaller, more efficient compressor, rather than purchasing a new, smaller unit. Such a retrofit may be economically justified, especially during a compressor failure, provided the oversizing of the existing unit is not too great. A used, 15-year old, single-package heat pump with a capillary tube expansion device on the indoor coil was purchased and tested in a set of environmental chambers to determine its cooling performance at various conditions. The system was also modeled to estimate its existing performance, and that with two different types of retrofitted state-of-the-art (SOA) efficient compressors with about 30% less capacity than the original compressor. This reduced the overall system cooling capacity by about 25%. Modeling estimated that the retrofit would increase system EER at 95 F by 30%, SEER by 34%, and reduce power demand by 39% compared to the existing unit. Reduced cycling losses account for the higher increase in SEER.

Levins, W.P.; Rice, C.K.; Baxter, V.D.

1996-05-01T23:59:59.000Z

319

Candidate chemical systems for air cooled, solar powered, absorption air conditioner design. Part II. Solid absorbents, high latent heat refrigerants  

DOE Green Energy (OSTI)

Work done in attempting to qualify absorption refrigeration systems based on refrigerants with intermediate latent heats of vaporization is summarized. In practice, these comprise methanol, ammonia, and methylamine. A wide variety of organic substances, salts, and mixtures were evaluated in as systematic a manner as possible. Several systems of interest are described. The system, LiClO/sub 3/--LiBr--H/sub 2/O, is a good back up system to our first choice of an antifreeze additive system, and thermodynamically promising but subject to some inconvenient materials limitations. The system, LiBr/ZnBr/sub 2/--methanol, is thermodynamically promising but requires additional kinetic qualification. Chemical stability of the system, LiCNS--ammonia/methylamine with various other third components, does not appear to be adequate for a long-lived system.

Biermann, W. J.

1978-04-01T23:59:59.000Z

320

Buildings Energy Data Book: 5.3 Heating, Cooling, and Ventilation Equipment  

Buildings Energy Data Book (EERE)

1 1 Main Residential Heating Equipment as of 1987, 1993, 1997, 2001, and 2005 (Percent of Total Households) Equipment Type 1987 1993 1997 2001 2005 Natural Gas 55% 53% 53% 55% 52% Central Warm-Air Furnace 35% 36% 38% 42% 40% Steam or Hot-Water System 10% 9% 7% 7% 7% Floor/Wall/Pipeless Furnace 6% 4% 4% 3% 2% Room Heater/Other 4% 3% 4% 3% 3% Electricity 20% 26% 29% 29% 30% Central Warm-Air Furnace 8% 10% 11% 12% 14% Heat Pump 5% 8% 10% 10% 8% Built-In Electric Units 6% 7% 7% 6% 5% Other 1% 1% 2% 2% 1% Fuel Oil 12% 11% 9% 7% 7% Steam or Hot-Water System 7% 6% 5% 4% 4% Central Warm-Air Furnace 4% 5% 4% 3% 3% Other 1% 0% 0% 0% 0% Other 13% 11% 9% 8% 10% Total 100% 100% 100% 100% 100% Note(s): Source(s): Other equipment includes wood, LPG, kerosene, other fuels, and none. EIA, A Look at Residential Consumption in 2005, June 2008, Table HC2-4; EIA, A Look at Residential Energy Consumption in 2001, Apr. 2004, 'Table HC3-

Note: This page contains sample records for the topic "furnaces heat air" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Using Transformation and Formation Maps to Study the Role of Air–Sea Heat Fluxes in North Atlantic Eighteen Degree Water Formation  

Science Conference Proceedings (OSTI)

The Walin water mass framework quantifies the rate at which water is transformed from one temperature class to another by air–sea heat fluxes (transformation). The divergence of the transformation rate yields the rate at which a given temperature ...

Guillaume Maze; Gael Forget; Martha Buckley; John Marshall; Ivana Cerovecki

2009-08-01T23:59:59.000Z

322

Consumer life-cycle cost impacts of energy-efficiency standards for residential-type central air conditioners and heat pumps  

SciTech Connect

In support of the federal government's efforts to raise the minimum energy-efficiency standards for residential-type central air conditioners and heat pumps, a consumer life-cycle cost (LCC) analysis was conducted to demonstrate the economic impacts on individual consumers from revisions to the standards. LCC is the consumer's cost of purchasing and installing an air conditioner or heat pump and operating the unit over its lifetime. The LCC analysis is conducted on a nationally representative sample of air conditioner and heat pump consumers resulting in a distribution of LCC impacts showing the percentage of consumers that are either benefiting or being burdened by increased standards. Relative to the existing minimum efficiency standard of 10 SEER, the results show that a majority of split system air conditioner and heat pump consumers will either benefit or be insignificantly impacted by increased efficiency standards of up to 13 SEER.

Rosenquist, Gregory; Chan, Peter; Lekov, Alex; McMahon, James; Van Buskirk, Robert

2001-10-10T23:59:59.000Z

323

Air–Sea Heat Exchanges Characteristic of a Prominent Midlatitude Oceanic Front in the South Indian Ocean as Simulated in a High-Resolution Coupled GCM  

Science Conference Proceedings (OSTI)

An integration of a high-resolution coupled general circulation model whose ocean component is eddy permitting and thus able to reproduce a sharp gradient in sea surface temperature (SST) is analyzed to investigate air–sea heat exchanges ...

Masami Nonaka; Hisashi Nakamura; Bunmei Taguchi; Nobumasa Komori; Akira Kuwano-Yoshida; Koutarou Takaya

2009-12-01T23:59:59.000Z

324

Variable Refrigerant Flow Air Conditioners and Heat Pumps for Commercial Buildings  

Science Conference Proceedings (OSTI)

Multi-split heat pumps have evolved from a technology suitable for residential and light commercial buildings to variable refrigerant flow (VRF) systems that can provide efficient space conditioning for large commercial buildings. VRF systems are enhanced versions of ductless multi-split systems, permitting more indoor units to be connected to each outdoor unit and providing additional features such as simultaneous heating and cooling and heat recovery. VRF systems are very popular in Asia and Europe and...

2008-01-25T23:59:59.000Z

325

Improving the Field Performance of Natural Gas Furnaces, Chicago, Illinois (Fact Sheet)  

SciTech Connect

The objective of this project is to examine the impact that common installation practices and age-induced equipment degradation may have on the installed performance of natural gas furnaces, as measured by steady-state efficiency and AFUE. PARR identified twelve furnaces of various ages and efficiencies that were operating in residential homes in the Des Moines Iowa metropolitan area and worked with a local HVAC contractor to retrieve them and test them for steady-state efficiency and AFUE in the lab. Prior to removal, system airflow, static pressure, equipment temperature rise, and flue loss measurements were recorded for each furnace. After removal from the field the furnaces were transported to the Gas Technology Institute (GTI) laboratory, where PARR conducted steady-state efficiency and AFUE testing. The test results show that steady-state efficiency in the field was 6.4% lower than that measured for the same furnaces under standard conditions in the lab, which included tuning the furnace input and air flow rate. Comparing AFUE measured under ASHRAE standard conditions with the label value shows no reduction in efficiency for the furnaces in this study over their 15 to 24 years of operation when tuned to standard conditions. Further analysis of the data showed no significant correlation between efficiency change and the age or the rated efficiency of the furnace.

Rothgeb, S.; Brand, L.

2013-11-01T23:59:59.000Z

326

Measurement of airflow in residential furnaces  

E-Print Network (OSTI)

cut out of a piece of plywood that is attached to the inlet.the size of the furnace outlet cut in the plywood. ESLtaped the furnace to the plywood and strapped it in place.

Biermayer, Peter J.; Lutz, James; Lekov, Alex

2004-01-01T23:59:59.000Z

327

Heat transfer characteristics of a two-phase, air-water direct contact evaporator.  

E-Print Network (OSTI)

??The purpose of the research was to carry out an experimental and theoretical investigation of the heat transfer on a direct contact column for desalination… (more)

Zanette, Luca

2013-01-01T23:59:59.000Z

328

Development of an air-cooled, loop-type heat pipe with multiple condensers.  

E-Print Network (OSTI)

??Thermal management challenges are prevalent in various applications ranging from consumer electronics to high performance computing systems. Heat pipes are capillary-pumped devices that take advantage… (more)

Kariya, H. Arthur (Harumichi Arthur)

2012-01-01T23:59:59.000Z

329

The Study of Heat and Mass Transfer In The Generator For an Absorption Air Conditioning System.  

E-Print Network (OSTI)

??This thesis is aimed to study the heat and mass transfer performance of a generator for the absorption cooling system. Both aqueous lithium bromide (LiBr)… (more)

Hsu, Yu-lien

2012-01-01T23:59:59.000Z

330

The Impact of Codes, Regulations, and Standards on Split-Unitary Air Conditioners and Heat Pumps, 65,000 Btu/hr and Under  

Science Conference Proceedings (OSTI)

This document establishes a framework for understanding the technology and regulation of split-unitary air conditioners and heat pumps 65,000 Btu/hr and under. The reporting framework is structured so that it can be added to in the future. This study is broken into six chapters:The basic components, refrigeration cycle, operation, and efficiency ratings of split-unitary air conditioners and heat pumps are covered for background information.Equipment efficiency ...

2012-09-21T23:59:59.000Z

331

Using Waste Heat for External Processes (English/Chinese) (Fact Sheet)  

SciTech Connect

Chinese translation of the Using Waste Heat for External Processes fact sheet. Provides suggestions on how to use waste heat in industrial applications. The temperature of exhaust gases from fuel-fired industrial processes depends mainly on the process temperature and the waste heat recovery method. Figure 1 shows the heat lost in exhaust gases at various exhaust gas temperatures and percentages of excess air. Energy from gases exhausted from higher temperature processes (primary processes) can be recovered and used for lower temperature processes (secondary processes). One example is to generate steam using waste heat boilers for the fluid heaters used in petroleum crude processing. In addition, many companies install heat exchangers on the exhaust stacks of furnaces and ovens to produce hot water or to generate hot air for space heating.

Not Available

2011-10-01T23:59:59.000Z

332

Saving Energy and Reducing Emissions from the Regeneration Air System of a Butane Dehydrogenation Plant  

E-Print Network (OSTI)

Texas Petrochemicals operates a butane dehydrogenation unit producing MTBE for reformulated gasoline that was originally constructed when energy was cheap and prior to environmental regulation. The process exhausts 900,000 pounds per hour of air at 900 to 1100°F containing CO and VOC. By installing a furnace/heat recovery steam generator, Texas Petrochemicals achieved significant reductions of VOC, CO, and NOx, along with energy savings.

John, T. P.

1998-04-01T23:59:59.000Z

333

CWS-fired residential warm-air heating system. Quarterly report, January 22, 1987--April 30, 1987  

Science Conference Proceedings (OSTI)

The objective of this project is the development of a coal water slurry burning residential furnace. A literature survey has been performed. Also, the preliminary testing of prototype components was carried out. Design criteria and specifications are discussed.

Becker, F.E.; Smolensky, L.A.; McPeak, M.A.

1987-05-01T23:59:59.000Z

334

Furnace Systems Technology Workshop Brochure (PDF)  

Science Conference Proceedings (OSTI)

To register, visit the furnace systems technology ... transfer, atmospheres and purging requirements, effective control systems, and fuel efficiency, production ...

335

Analysis of fluid flow and heat transfer in a rib grit roughened surface solar air heater using CFD  

SciTech Connect

This paper presents the study of fluid flow and heat transfer in a solar air heater by using Computational Fluid Dynamics (CFD) which reduces time and cost. Lower side of collector plate is made rough with metal ribs of circular, square and triangular cross-section, having 60 inclinations to the air flow. The grit rib elements are fixed on the surface in staggered manner to form defined grid. The system and operating parameters studied are: e/D{sub h} = 0.044, p/e = 17.5 and l/s = 1.72, for the Reynolds number range 3600-17,000. To validate CFD results, experimental investigations were carried out in the laboratory. It is found that experimental and CFD analysis results give the good agreement. The optimization of rib geometry and its angle of attack is also done. The square cross-section ribs with 58 angle of attack give maximum heat transfer. The percentage enhancement in the heat transfer for square plate over smooth surface is 30%. (author)

Karmare, S.V. [Department of Mechanical Engineering, Government College Engineering, Karad 415 124, Maharashtra (India); Shivaji University, Kolhapur, Maharashtra (India); Tikekar, A.N. [Department of Mechanical Engineering, Walchand College of Engineering, Sangli (India); Shivaji University, Kolhapur, Maharashtra (India)

2010-03-15T23:59:59.000Z

336

Coal combustion under conditions of blast furnace injection. Final technical report, September 1, 1992--August 31, 1993  

Science Conference Proceedings (OSTI)

A potentially new use for Illinois coal is as a fuel injected into a blast furnace to produce molten iron as the first step in steel production. Because of its increasing cost and decreasing availability, metallurgical coke is now being replaced by coal injected at the tuyere area of the furnace where the blast air enters. The purpose of this study is to evaluate the combustion of coal during the blast furnace injection process and to delineate the optimum properties of the feed coal. This investigation is significant to the use of Illinois coal in that the limited research to date suggests that coals of low fluidity and moderate to high sulfur and chlorine contents are suitable feedstocks for blast furnace injection. During the first phase of this project a number of the objectives were realized, specifically: (1) a blast furnace sampling system was developed and used successfully to collect samples inside an active furnace; (2) two sets of blast furnace samples were collected and petrographic analysis showed that char derived from injected coal is entering the reduction zone of the furnace; (3) a coal/char sampling probe was designed and fabricated; (4) the completion of a program of reactivity experiments on the injected coal char, blast furnace coke and Herrin No. 6 char. The results of the reactivity experiments indicate that Herrin No. 6 coal is similar or even superior to coals now being used in blast furnace injection and that additional testing is warranted.

Crelling, J.C. [Southern Illinois Univ., Carbondale, IL (United States). Dept. of Geology; Case, E.R. [Armco, Inc., Middletown, OH (United States). Research and Technology Div.

1993-12-31T23:59:59.000Z

337

On Weak Zonally Symmetric ENSO Atmospheric Heating and the Strong Zonally Symmetric ENSO Air Temperature Response  

Science Conference Proceedings (OSTI)

Observations show that regions of anomalous deep convective El Niño–Southern Oscillation (ENSO) heating tend to be balanced by anomalous ENSO cooling elsewhere so that, averaged around the globe from (say) 10°S to 10°N, the net anomalous heating ...

Allan J. Clarke; Kwang-Y. Kim

2005-06-01T23:59:59.000Z

338

Can Shipboard Measurements Reveal Secular Changes in Tropical Air–Sea Heat Flux?  

Science Conference Proceedings (OSTI)

A new Comprehensive Ocean-Atmosphere Data Set for the period 1854–1979 will soon become available for studies of secular climate changes in ocean surface heat flux. Of the observed variables from which heat flux is calculated, wind speed and sea ...

C. S. Ramage

1984-02-01T23:59:59.000Z

339

The Role of Whitecap Bubbles in Air–Sea Heat and Moisture Exchange  

Science Conference Proceedings (OSTI)

In high winds, the sea surface is no longer simply connected. Whitecap bubbles and sea spray provide additional surfaces that may enhance the transfer of any quantity normally exchanged at the air–sea interface. This paper investigates the role ...

Edgar L. Andreas; Edward C. Monahan

2000-02-01T23:59:59.000Z

340

Evaluation of a heated-air airship for the environment of Titan  

E-Print Network (OSTI)

Future exploration of Saturn's moon Titan can be carried out by airships, which have the capability to study the atmosphere as well as the capability to land and study the surface at multiple locations. Several lighter-than-air ...

Heller, Richard, S.M. Massachusetts Institute of Technology

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "furnaces heat air" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Glass science tutorial: Lecture No. 4, commercial glass melting and associated air emission issues  

SciTech Connect

This document serves as a manual for a workshop on commercial glass melting and associated air emission issues. Areas covered include: An overview of the glass industry; Furnace design and construction practices; Melting furnace operation; Energy input methods and controls; Air legislation and regulations; Soda lime emission mechanisms; and, Post furnace emission controls. Supporting papers are also included.

Kruger, A.A.

1995-01-01T23:59:59.000Z

342

Modeling of solar heating and air conditioning. Progress report, October 31, 1974--December 31, 1975  

DOE Green Energy (OSTI)

The principal objective of the research is to develop the means to identify and optimize practical systems for heating and cooling of buildings with solar energy in the United States. This will be done through simulation methods. Secondary objectives are to: extend and refine TRNSYS (a modular solar energy system simulation program); develop the means of supporting TRNSYS users in other laboratories; use TRNSYS (and other simulation programs) to develop design procedures for solar heating and cooling processes; design and evaluate an experimental solar heating system on a Wisconsin farm residence.

Duffie, J.A.; Beckman, W.A.

1975-12-31T23:59:59.000Z

343

Comment submitted by the Air Conditioning, Heating and Refrigeration Institute (AHRI) regarding the Energy Star Verification Testing Program  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

AHRI Comments - DOE Verification Testing in Support of Energy Star AHRI Comments - DOE Verification Testing in Support of Energy Star May 9, 2011 P a g e | 1 May 9, 2010 Ms. Ashley Armstrong U.S. Department of Energy 1000 Independence Avenue, SW Washington, DC 20585 RE: DOE Verification Testing in Support of Energy Star Dear Ms. Armstrong: I am writing on behalf of the Air Conditioning, Heating and Refrigeration Institute (AHRI) to address the proposed DOE requirements for verification testing in support of the Energy Star program. AHRI is the trade association representing manufacturers of heating, cooling, and commercial refrigeration equipment. More than 300 members strong, AHRI is an internationally recognized advocate for the industry, and develops standards for and certifies the performance of many of the

344

Geothermal heating for Caliente, Nevada  

DOE Green Energy (OSTI)

Utilization of geothermal resources in the town of Caliente, Nevada (population 600) has been the objective of two grants. The first grant was awarded to Ferg Wallis, part-owner and operator of the Agua Caliente Trailer Park, to assess the potential of hot geothermal water for heating the 53 trailers in his park. The results from test wells indicate sustainable temperatures of 140/sup 0/ to 160/sup 0/F. Three wells were drilled to supply all 53 trailers with domestic hot water heating, 11 trailers with space heating and hot water for the laundry from the geothermal resource. System payback in terms of energy cost-savings is estimated at less than two years. The second grant was awarded to Grover C. Dils Medical Center in Caliente to drill a geothermal well and pipe the hot water through a heat exchanger to preheat air for space heating. This geothermal preheater served to convert the existing forced air electric furnace to a booster system. It is estimated that the hospital will save an average of $5300 in electric bills per year, at the current rate of $.0275/KWH. This represents a payback of approximately two years. Subsequent studies on the geothermal resource base in Caliente and on the economics of district heating indicate that geothermal may represent the most effective supply of energy for Caliente. Two of these studies are included as appendices.

Wallis, F.; Schaper, J.

1981-02-01T23:59:59.000Z

345

Coke battery with 51-m{sup 3} furnace chambers and lateral supply of mixed gas  

SciTech Connect

The basic approaches employed in the construction of coke battery 11A at OAO Magnitogorskii Metallurgicheskii Kombinat are outlined. This battery includes 51.0-m{sup 3} furnaces and a dust-free coke-supply system designed by Giprokoks with lateral gas supply; it is heated exclusively by low-calorific mixed gas consisting of blast-furnace gas with added coke-oven gas. The 82 furnaces in the coke battery are divided into two blocks of 41. The gross coke output of the battery (6% moisture content) is 1140000 t/yr.

V.I. Rudyka; N.Y. Chebotarev; O.N. Surenskii; V.V. Derevich [Giprokoks, the State Institute for the Design of Coke-Industry Enterprises, Kharkov (Ukraine)

2009-07-15T23:59:59.000Z

346

The Impact of Charge on Performance of an Air-to-Air Heat Pump for R22 and Three Binary Blends of Refrigerants 32 and 134a  

E-Print Network (OSTI)

An experimental study was conducted in which the performance of three blends of R134a and R32 were compared to R22. The effect of refrigerant charge and the size of expansion device on the performance of these refrigerants in an air-to-air heat pump operating in the air-conditioning mode was quantified. All tests were conducted according to ASHRAE Standard 116 (1983). The mixtures consisted of 60%/40%, 70%/30% and 80%/20% ratios by mass of R134a and R32. Charge levels of 5, 5.45, 5.90 and 6.00 kilograms (11, 12, 13 and 14 pounds) were tested. At each charge level, outdoor room conditions of 27.8°C, 35.0°C and 40.6°C (82°F, 95°F and 105°F) were tested. For each combination of charge level and outdoor room temperature, orifice diameters of 1.64, 1.78, 1.96 and 2.07 millimeters (0.0645, 0.0700, 0.0770 and 0.0815 inches) were tested. Three variables were used to quantify refrigerant performance: total capacity, total electrical power consumption and coefficient of performance (COP). Several other variables such as mass flow rate, compressor suction pressures and differential pressures were also used to determine system characteristics. The performance of the three mixtures was not as good as the R22. The capacities were between 7 and 17% lower than R22. The energy efficiency ratios were IV within three percent in some cases but the corresponding capacities at these EERs were more than 12% lower than the R22 base case. The best results for a mixture was the 60/40 blend. The capacity was 7.3% lower than the base case and the EER was 8.5% lower.

Robinson, J. H.

1993-08-01T23:59:59.000Z

347

Sea-Air Heat and Freshwater Fluxes in the Drake Passage and Western Scotia Sea  

Science Conference Proceedings (OSTI)

Hydrographic data from the vicinity of the Antarctic Polar Front in the Drake Passage and the western Scotia Sea are used to estimate the heat content and salinity differences for the upper ocean between summer and winter. Assuming that these ...

Alberto R. Piola; Daniel T. Georgi

1981-01-01T23:59:59.000Z

348

Simulations of sizing and comfort improvements for residential forced-air heating and cooling systems  

E-Print Network (OSTI)

heating system given by ACCA R-J for different climate zonesClimate Zone Capacity, kW (kBtu/h ) Climate Zone Capacity, kW ( kBtu/h )

Walker, I.S.; Degenetais, G.; Siegel, J.A.

2002-01-01T23:59:59.000Z

349

Heat transfer and fluid dynamics of air-water two-phase flow in micro-channels  

SciTech Connect

Heat transfer, pressure drop, and void fraction were simultaneously measured for upward heated air-water non-boiling two-phase flow in 0.51 mm ID tube to investigate thermo-hydro dynamic characteristics of two-phase flow in micro-channels. At low liquid superficial velocity j{sub l} frictional pressure drop agreed with Mishima-Hibiki's correlation, whereas agreed with Chisholm-Laird's correlation at relatively high j{sub l}. Void fraction was lower than the homogeneous model and conventional empirical correlations. To interpret the decrease of void fraction with decrease of tube diameter, a relation among the void fraction, pressure gradient and tube diameter was derived. Heat transfer coefficient fairly agreed with the data for 1.03 and 2.01 mm ID tubes when j{sub l} was relatively high. But it became lower than that for larger diameter tubes when j{sub l} was low. Analogy between heat transfer and frictional pressure drop was proved to hold roughly for the two-phase flow in micro-channel. But satisfactory relation was not obtained under the condition of low liquid superficial velocity. (author)

Kaji, Masuo; Sawai, Toru; Kagi, Yosuke [Department of Mechanical Engineering, School of Biology-Oriented Science and Technology, Kinki University, 930 Nishi-mitani, Kinokawa, Wakayama 649-6493 (Japan); Ueda, Tadanobu [Toyota Central R and D Laboratory, Incorporated, 41-1 Yokomichi, Nagakute, Aichi 480-1192 (Japan)

2010-05-15T23:59:59.000Z

350

Direct current, closed furnace silicon technology  

Science Conference Proceedings (OSTI)

The dc closed furnace technology for smelting silicon offers technical operating challenges, as well as, economic opportunities for off-gas recovery, reduced electrode consumption, reduced reductant oxidation losses, reduced energy consumption, and improved silicon recovery. The 10 mva dc closed furnace is located in East Selkirk, Manitoba. Construction of this pilot plant was started in September 1990. Following successful commissioning of the furnace in 1992, a number of smelting tests have been conducted aimed at optimization of the furnace operation and the raw material mix. The operation of a closed furnace is significantly different from an open furnace operation. The major difference being in the mechanical movement of the mix, off-gas recovery, and inability to observe the process. These differences made data collection and analysis critical in making operating decisions. This closed furnace was operated by computer control (state of the art in the smelling industry).

Dosaj, V.D. [Dow Corning Corp., Midland, MI (United States); May, J.B. [Dow Corning Corp., Freeland, MI (United States); Arvidson, A.N. [Meadow Materials, Manitoba (Canada)

1994-05-01T23:59:59.000Z

351

Combined Heat and Power: Coal-Fired Air Turbine (CAT)-Cycle Plant  

DOE Green Energy (OSTI)

By combining an integrated system with a gas turbine, coal-fired air turbine cycle technology can produce energy at an efficiency rate of over 40%, with capital and operating costs below those of competing conventional systems. Read this fact sheet to discover the additional benefits of this exciting new technology.

Recca, L.

1999-01-29T23:59:59.000Z

352

Home Energy Saver  

NLE Websites -- All DOE Office Websites (Extended Search)

Heater Heat Pumps Replacing Your Electric Furnace and CAC with a Heat Pump Sealing Home Air Leaks LPG Furnaces Efficient LPG-fired Water Heaters Oil Furnaces Efficient...

353

Transpired Solar Collector at NREL's Waste Handling Facility Uses Solar Energy to Heat Ventilation Air (Fact Sheet) (Revised), Federal Energy Management Program (FEMP)  

NLE Websites -- All DOE Office Websites (Extended Search)

Highlights Highlights System Size 300 ft 2 transpired solar collector Energy Production About 125 Btu/hr/ft 2 (400 W/m 2 ) of heat delivery under ideal conditions (full sun) Installation Date 1990 Motivation Provide solar-heated ventilation air to offset some of the heating with conventional electric resistance heaters Annual Savings 14,310 kWh (49 million Btu/yr) or about 26% of the energy required to heat the facility's ventilation air System Details Components Black, 300 ft 2 corrugated aluminum transpired solar collector with a porosity of 2%; bypass damper; two-speed 3000 CFM vane axial supply fan; electric duct heater; thermostat controller Storage None Loads 188 million Btu/year (55,038 kWh/year) winter average to heat 1,300 ft 2 Waste Handling Facility

354

Transpired Solar Collector at NREL's Waste Handling Facility Uses Solar Energy to Heat Ventilation Air (Fact Sheet) (Revised), Federal Energy Management Program (FEMP)  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Highlights Highlights System Size 300 ft 2 transpired solar collector Energy Production About 125 Btu/hr/ft 2 (400 W/m 2 ) of heat delivery under ideal conditions (full sun) Installation Date 1990 Motivation Provide solar-heated ventilation air to offset some of the heating with conventional electric resistance heaters Annual Savings 14,310 kWh (49 million Btu/yr) or about 26% of the energy required to heat the facility's ventilation air System Details Components Black, 300 ft 2 corrugated aluminum transpired solar collector with a porosity of 2%; bypass damper; two-speed 3000 CFM vane axial supply fan; electric duct heater; thermostat controller Storage None Loads 188 million Btu/year (55,038 kWh/year) winter average to heat 1,300 ft 2 Waste Handling Facility

355

Modeling energy consumption of residential furnaces and boilers in U.S. homes  

E-Print Network (OSTI)

alternative furnaces used in each house required derivation of the heating and coolingalternative efficiency levels and design options to meet the same heating and coolingand cooling loads of each sample house are known, it is possible to estimate what the energy consumption of alternative (

Lutz, James; Dunham-Whitehead, Camilla; Lekov, Alex; McMahon, James

2004-01-01T23:59:59.000Z

356

Numerical Investigation of Heat Transfer to Fully Developed Turbulent Air Flow in a Concentric Pipe  

Science Conference Proceedings (OSTI)

Numerical simulation using standard k-e turbulencemodel was developed to investigate numerically thecharacteristic of backward-facing step flow in a concentricpipe. This research is focused on the surface temperature, localheat transfer coefficient and ... Keywords: Numerical Simulation, Heat Transfer, Turbulent Flow, Computational Fluid Dynamics, Backward Facing Step

Cheen Sean Oon, Ahmad Badarudin, Salim Newaz Kazi, Arif Syazwan

2013-09-01T23:59:59.000Z

357

Energy savings and economics of advanced control strategies for packaged air conditioners with gas heat  

Science Conference Proceedings (OSTI)

This paper presents an evaluation of the potential energy savings from adding advanced control to existing packaged air conditioners. Advanced control options include air-side economizer, multi-speed fan control, demand control ventilation and staged cooling. The energy and cost savings from the different control strategies individually and in combination are estimated using the EnergyPlus detailed energy simulation program for four building types, namely, a small office building, a stand-alone retail building, a strip mall building and a supermarket building. For each of the four building types, the simulation was run for 16 locations covering all 15 climate zones in the U.S. The maximum installed cost of a replacement controller that provides acceptable payback periods to owners is estimated.

Wang, Weimin; Katipamula, Srinivas; Huang, Yunzhi; Brambley, Michael R.

2013-10-01T23:59:59.000Z

358

Exploratory Research on MEMS Technology for Air-Conditioning and Heat-Pumps  

Science Conference Proceedings (OSTI)

Multiple refrigerant channels are essential for improving system efficiency in refrigeration and air-conditioning systems. A study was conducted to study the use of micro-electrical-mechanical- systems (MEMS) and micro device technologies to improve current vapor compression refrigeration cycles. The first step toward realizing this goal, and the focus of this report, is to determine how to better control multi-channel evaporators by reducing refrigerant maldistribution among channels.

1998-12-14T23:59:59.000Z

359

Air-To-Water Heat Pumps with Radiant Delivery in Low Load Homes: Tucson, Arizona and Chico, California (Fact Sheet)  

SciTech Connect

Space conditioning represents nearly 50% of average residential household energy consumption, highlighting the need to identify alternative cost-effective, energy-efficient cooling and heating strategies. As homes are better built, there is an increasing need for strategies that are particularly well suited for high performance, low load homes. ARBI researchers worked with two test homes in hot-dry climates to evaluate the in-situ performance of air-to-water heat pump (AWHP) systems, an energy efficient space conditioning solution designed to cost-effectively provide comfort in homes with efficient, safe, and durable operation. Two monitoring projects of test houses in hot-dry climates were initiated in 2010 to test this system. Both systems were fully instrumented and have been monitored over one year to capture complete performance data over the cooling and heating seasons. Results are used to quantify energy savings, cost-effectiveness, and system performance using different operating modes and strategies. A calibrated TRNSYS model was developed and used to evaluate performance in various climate regions. This strategy is most effective in tight, insulated homes with high levels of thermal mass (i.e. exposed slab floors).

Not Available

2013-11-01T23:59:59.000Z

360

The Effect of Alternate Defrost Strategies on the Reverse-Cycle Defrost of an Air-Source Heat Pump  

E-Print Network (OSTI)

The effect of alternate defrost strategies on the transient performance of the air-source heat pump during the reverse-cycle defrost was investigated. Tests of a base-case heat pump configuration and defrost strategy were completed to provide a basis for performance evaluations of the alternate defrost strategies. The compressor and indoor coil fan operated continuously in the base-case defrost strategy, and the outdoor coil fan was stopped. Alternate defrost strategies utilized variations in fan and compressor operation during and after the defrost. Pre-starting of the outdoor coil fan prior to termination of the reverse-cycle defrost reduced pressure spikes commonly seen at defrost termination in the base-case defrost strategy. A strategy in which the compressor was stopped and the outdoor coil was allowed to drain of melted frost during the last three minutes of the defrost improved overall cyclic performance. Strategies which involved stopping of the indoor fan during defrost or delaying the start of the outdoor fan following defrost termination had a negative impact on defrost performance. A final strategy involved down-sizing of the heat pump compressor from 3.0 tons (36,000 btu/hr) capacity to 2.5 tons capacity. This alternate configuration had a comparable overall performance with the base-case while having a reduced frequency of required defrost periods.

Schliesing, J. S.

1988-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "furnaces heat air" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Systematic method for the condition assessment of central heating plants in Air Force Logistics Command. Master's thesis  

Science Conference Proceedings (OSTI)

Air Force Logistics Command (AFLC), facing decreasing funds and aging utility systems, needed a method to objectively rate its central heating plants. Such a rating system would be used to compare heating plants throughout the command to identify potential problem areas and prioritize major repair projects. This thesis used a Delphi questionnaire to gather opinions from heating plant experts in order to identify and prioritize components considered most critical to overall plant operation. In addition, the experts suggested measurements which could be used to evaluate component conditions. By combining expert opinions and reading from technical literature, component model rating schemes were developed for AFLC's steam and high temperature hot water plants. Based on measurements and observations of critical components in the plant, a score between 0 and 100 is assigned to each component (for example, condensate piping, deaerator, etc.), each plant subsystem (distribution system, water treatment system, etc.), and to the plant as a whole. These component model rating schemes and the resultant overall condition index scores will enable AFLC to focus their management attention and allocate needed resources to the plants in greatest need of repair.

Starmack, G.J.

1990-09-01T23:59:59.000Z

362

List of Central Air conditioners Incentives | Open Energy Information  

Open Energy Info (EERE)

Central Air conditioners Incentives Central Air conditioners Incentives Jump to: navigation, search The following contains the list of 1032 Central Air conditioners Incentives. CSV (rows 1-500) CSV (rows 501-1000) CSV (rows 1001-1032) Incentive Incentive Type Place Applicable Sector Eligible Technologies Active AEP (Central and North) - CitySmart Program (Texas) Utility Rebate Program Texas Commercial Industrial Institutional Local Government Schools Boilers Central Air conditioners Chillers Comprehensive Measures/Whole Building Custom/Others pending approval Energy Mgmt. Systems/Building Controls Furnaces Heat pumps Lighting Lighting Controls/Sensors Motor VFDs Motors Roofs Windows Yes AEP (Central and SWEPCO) - Coolsaver A/C Tune Up (Texas) Utility Rebate Program Texas Commercial Installer/Contractor

363

Verifying energy savings with minimal metered data: The Hunter heat pump analysis  

SciTech Connect

In November 1992, Hunter Army Air Field (AAF) completed the installation of 489 air-source heat pumps -- a new heat pump and air-handling unit for each residence. The air-source heat pumps replaced older, less efficient, air-conditioning systems, fuel oil-fired furnaces, and fan coil units. Hunter AAF originally contacted to upgrade the old family housing heating, ventilating, and air-conditioning (HVAC) systems with high efficiency air-conditioning systems and natural gas furnaces, but an alternative proposal and following energy studies indicated that heat pumps were a more life-cycle cost-effective alternative. Six months after the heat pumps were installed, Hunter`s energy bills appeared to be increasing, not decreasing as expected. In early 1994, Pacific Northwest Laboratory` (PNL) began an analysis to determine if there were any energy savings resulting from the heat pump installation as predicted by previous energy studies. The problem is that the HVAC systems are not specifically submetered to support verifying the resulting energy savings and, as is the case with most federal facilities, even the homes are not individually metered. Savings verification needed to be accomplished with die existing and available metered data. This data consisted primarily of monthly electric submeter readings from the two housing subdivision meters, historical fuel oil delivery records for family housing, and monthly base-wide electric bills. The objective of the study is to verify the change in energy consumption in family housing and, to the extent possible, identify how much of the change in consumption is attributable to the new HVAC system and how much is probably attributable to other factors, such as the weather.

Parker, S.A.

1995-03-01T23:59:59.000Z

364

High Efficiency Integrated Space Conditioning, Water Heating and Air Distribution System for HUD-Code Manufactured Housing  

SciTech Connect

Recognizing the need for new space conditioning and water heating systems for manufactured housing, DeLima Associates assembled a team to develop a space conditioning system that would enhance comfort conditions while also reducing energy usage at the systems level. The product, Comboflair® was defined as a result of a needs analysis of project sponsors and industry stakeholders. An integrated system would be developed that would combine a packaged airconditioning system with a small-duct, high-velocity air distribution system. In its basic configuration, the source for space heating would be a gas water heater. The complete system would be installed at the manufactured home factory and would require no site installation work at the homesite as is now required with conventional split-system air conditioners. Several prototypes were fabricated and tested before a field test unit was completed in October 2005. The Comboflair® system, complete with ductwork, was installed in a 1,984 square feet, double-wide manufactured home built by Palm Harbor Homes in Austin, TX. After the home was transported and installed at a Palm Harbor dealer lot in Austin, TX, a data acquisition system was installed for remote data collection. Over 60 parameters were continuously monitored and measurements were transmitted to a remote site every 15 minutes for performance analysis. The Comboflair® system was field tested from February 2006 until April 2007. The cooling system performed in accordance with the design specifications. The heating system initially could not provide the needed capacity at peak heating conditions until the water heater was replaced with a higher capacity standard water heater. All system comfort goals were then met. As a result of field testing, we have identified improvements to be made to specific components for incorporation into production models. The Comboflair® system will be manufactured by Unico, Inc. at their new production facility in St. Louis, MO. The product will be initially launched in the hot-humid climates of the southern U.S.

Henry DeLima; Joe Akin; Joseph Pietsch

2008-09-14T23:59:59.000Z

365

Economics of residential gas furnaces and water heaters in United States new construction market  

SciTech Connect

New single-family home construction represents a significant and important market for the introduction of energy-efficient gas-fired space heating and water-heating equipment. In the new construction market, the choice of furnace and water-heater type is primarily driven by first cost considerations and the availability of power vent and condensing water heaters. Few analysis have been performed to assess the economic impacts of the different combinations of space and water-heating equipment. Thus, equipment is often installed without taking into consideration the potential economic and energy savings of installing space and water-heating equipment combinations. In this study, we use a life-cycle cost analysis that accounts for uncertainty and variability of the analysis inputs to assess the economic benefits of gas furnace and water-heater design combinations. This study accounts not only for the equipment cost but also for the cost of installing, maintaining, repairing, and operating the equipment over its lifetime. Overall, this study, which is focused on US single-family new construction households that install gas furnaces and storage water heaters, finds that installing a condensing or power-vent water heater together with condensing furnace is the most cost-effective option for the majority of these houses. Furthermore, the findings suggest that the new construction residential market could be a target market for the large-scale introduction of a combination of condensing or power-vent water heaters with condensing furnaces.

Lekov, Alex B.; Franco, Victor H.; Wong-Parodi, Gabrielle; McMahon, James E.; Chan, Peter

2009-05-06T23:59:59.000Z

366

7-29 A coal-burning power plant produces 300 MW of power. The amount of coal consumed during a one-day period and the rate of air flowing through the furnace are to be determined.  

E-Print Network (OSTI)

7-11 7-29 A coal-burning power plant produces 300 MW of power. The amount of coal consumed during The heating value of the coal is given to be 28,000 kJ/kg. Analysis (a) The rate and the amount of heat inputs'tQQ The amount and rate of coal consumed during this period are kg/s48.33 s360024 kg10893.2 MJ/kg28 MJ101.8 6

Bahrami, Majid

367

Blast Furnace Granulated Coal Injection System Demonstration...  

NLE Websites -- All DOE Office Websites (Extended Search)

2 Blast Furnace Granulated Coal Injection System Demonstration Project: A DOE Assessment June 2000 U. S. Department of Energy National Energy Technology Laboratory P.O. Box 880,...

368

Energy Control in Primary Aluminium Casthouse Furnaces  

Science Conference Proceedings (OSTI)

In order to effectively run a furnace with low energy consumption the burner's fuel ... Oxidation of Commercial Purity Aluminium Melts: An Experimental Study.

369

Measurement of airflow in residential furnaces  

SciTech Connect

In order to have a standard for furnaces that includes electricity consumption or for the efficiency of furnace blowers to be determined, it is necessary to determine the airflow of a furnace or furnace blower. This study focused on airflow testing, in order to determine if an existing test method for measuring blower airflow could be used to measure the airflow of a furnace, under conditions seen in actual installations and to collect data and insights into the operating characteristics of various types of furnace blowers, to use in the analysis of the electricity consumption of furnaces. Results of the measured airflow on furnaces with three types of blower and motor combinations are presented in the report. These included: (1) a forward-curved blower wheel with a typical permanent split capacitor (PSC) motor, (2) a forward-curved blower wheel with an electronically-commutated motor (ECM), and (3) a prototype blower, consisting of a backward-inclined blower wheel matched to an ECM motor prototype, which is being developed as an energy-saving alternative to conventional furnace blowers. The testing provided data on power consumption, static and total pressure, and blower speed.

Biermayer, Peter J.; Lutz, James; Lekov, Alex

2004-01-24T23:59:59.000Z

370

Dataplot Commands for Furnace Case Study  

Science Conference Proceedings (OSTI)

... variable label run Run Number variable label zone Furnace Location variable label wafer Wafer Number variable label filmthic Film Thickness (ang ...

2012-03-31T23:59:59.000Z

371

High Performance Sealing for Anode Baking Furnaces  

Science Conference Proceedings (OSTI)

Operation of an Open Type Anode Baking Furnace with a Temporary Crossover ... Wireless Communication for Secured Firing and Control Systems of Anode ...

372

Energy Efficiency Improvement in Anode Baking Furnaces  

Science Conference Proceedings (OSTI)

One of the high energy consumption facilities in a smelter is the Anode Baking ... Hydro Aluminium's Historical Evolution of Closed Type Anode Baking Furnace ...

373

Finding of No Significant Impact for Energy Conservation Standards for Residential Central Air Conditioners and Heat Pumps (01/01)  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

01 01 Federal Register / Vol. 66, No. 14 / Monday, January 22, 2001 / Notices DEPARTMENT OF ENERGY Office of Energy Efficiency and Renewable Energy Finding of No Significant Impact Energy Conservation Program for Consumer Products AGENCY: Department of Energy. ACTION: Finding of No Significant Impact (FONSI) for Energy Conservation Standard for Residential Central Air Conditioners and Heat Pumps. SUMMARY: The Energy Policy and Conservation Act, as amended by the National Energy Conservation Policy Act and the National Appliance Energy Conservation Act, and the National Appliance Energy Conservation Amendments, prescribes energy conservation standards for certain major household appliances, and requires the Department of Energy (DOE) to administer an energy conservation program for these products. Based on an

374

Advanced control strategies for heating, ventilation, air-conditioning, and refrigeration systems—An overview: Part I: Hard control  

SciTech Connect

A chronological overview of the advanced control strategies for heating, ventilation, air-conditioning, and refrigeration (HVAC&R) is presented in this article. The overview focuses on hard-computing or control techniques, such as proportional-integral-derivative, optimal, nonlinear, adaptive, and robust; soft-computing or control techniques, such as neural networks, fuzzy logic, genetic algorithms; and on the fusion or hybrid of hard- and soft-control techniques. Thus, it is to be noted that the terminology “hard” and “soft” computing/control has nothing to do with the “hardware” and “software” that is being generally used. Part I of a two-part series focuses on hard-control strategies, and Part II focuses on softand fusion-control in addition to some future directions in HVAC&R research. This overview is not intended to be an exhaustive survey on this topic, and any omission of other works is purely unintentional.

D. Subbaram Naidu; Craig G. Rieger

2011-02-01T23:59:59.000Z

375

VAPOR SHIELD FOR INDUCTION FURNACE  

DOE Patents (OSTI)

This patent relates to a water-cooled vapor shield for an inductlon furnace that will condense metallic vapors arising from the crucible and thus prevent their condensation on or near the induction coils, thereby eliminating possible corrosion or shorting out of the coils. This is accomplished by placing, about the top, of the crucible a disk, apron, and cooling jacket that separates the area of the coils from the interior of the cruclbIe and provides a cooled surface upon whlch the vapors may condense.

Reese, S.L.; Samoriga, S.A.

1958-03-11T23:59:59.000Z

376

Conceputual design of a solar-heated-air receiver coupled to a Brayton or Stirling engine  

DOE Green Energy (OSTI)

A particularly interesting possibility for a parabolic dish/cavity receiver combination is the coupling of the cavity to a Stirling or Brayton engine. The design of the receiver is a pacing item in the development of the approach and requires knowledge of the flux distribution within the receiver. Thus several cavity configurations need to be considered to ascertain the trade-offs between cavity geometry and flux distribution. Simple analytical tools developed are applied to the analysis and design of a dome-capped cylindrical receiver that has desirable characteristics for transferring heat to a Dish/Brayton or Dish/Stirling system.

Hamilton, N. I.; Jarvinen, P. O.

1979-01-01T23:59:59.000Z

377

DOE/EA-1352: Environmental Assessment for Proposed Energy Conservation Standards for Residential Central Air Conditioners and Heat Pumps (12/00)  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

52 52 ENVIRONMENTAL ASSESSMENT FOR PROPOSED ENERGY CONSERVATION STANDARDS FOR RESIDENTIAL CENTRAL AIR CONDITIONERS AND HEAT PUMPS December 2000 U.S. Department of Energy Assistant Secretary, Energy Efficiency & Renewable Energy Office of Building Research and Standards Washington, DC 20585 EA-i ENVIRONMENTAL ASSESSMENT FOR RESIDENTIAL CENTRAL AIR CONDITIONERS AND HEAT PUMPS TABLE OF CONTENTS 1.0 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . EA-1 2.0 PURPOSE AND NEED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . EA-1 3.0 ALTERNATIVES INCLUDING THE PROPOSED ACTION . . . . . . . . . . . . . . . . . EA-2 3.1 No Action Alternative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . EA-2 3.2 Proposed Standard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . EA-3 3.3 Alternative Standards

378

Measurement of the thermal performance of a Borehole Heat Exchanger while injecting air bubbles in the groundwater.  

E-Print Network (OSTI)

?? The most common way to exchange heat with the ground in Ground Source Heat Pump (GSHP) applications is with borehole heat exchangers (energy col-lectors… (more)

Calzada, Eduard

2012-01-01T23:59:59.000Z

379

Refinery Waste Heat Ammonia Absorption Refrigeration Plant (WHAARP) Recovers LPG's and Gasoline, Saves Energy, and Reduces Air Pollution  

E-Print Network (OSTI)

A first-of-its-kind Waste Heat Ammonia Absorption Refrigeration Plant (WHAARP™) was installed by Planetec Utility Services Co., Inc. in partnership with Energy Concepts Co. at Ultramar Diamond Shamrock's 30,000 barrel per day refinery in Denver, Colorado. The refrigeration unit is designed to provide refrigeration for two process units at the refinery while utilizing waste heat as the energy source. The added refrigeration capacity benefits the refinery by recovering salable products, debottlenecking process units, avoiding additional electrical demand, and reducing the refinery Energy Intensity Index. In addition, the WHAARP unit lowers air pollutant emissions by reducing excess fuel gas that is combusted in the refinery flare. A comprehensive utility and process efficiency Master Plan developed for the Denver refinery by Planetec provided the necessary platform for implementing this distinctive project. The $2.3 million WHAARP system was paid for in part by a $760,000 grant from the U.S. Department of Energy, as part of their "Industry of the Future Program". Total combined benefits are projected to be approximately $1 million/year with a 1.6 year simple payback including the grant funding.

Brant, B.; Brueske, S.; Erickson, D.; Papar, R.

1998-04-01T23:59:59.000Z

380

"Table HC14.4 Space Heating Characteristics by West Census Region, 2005"  

U.S. Energy Information Administration (EIA) Indexed Site

4 Space Heating Characteristics by West Census Region, 2005" 4 Space Heating Characteristics by West Census Region, 2005" " Million U.S. Housing Units" ,,"West Census Region" ,"U.S. Housing Units (millions)" ,,,"Census Division" ,,"Total West" "Space Heating Characteristics",,,"Mountain","Pacific" "Total",111.1,24.2,7.6,16.6 "Do Not Have Space Heating Equipment",1.2,0.7,"Q",0.7 "Have Main Space Heating Equipment",109.8,23.4,7.5,16 "Use Main Space Heating Equipment",109.1,22.9,7.4,15.4 "Have Equipment But Do Not Use It",0.8,0.6,"Q",0.5 "Main Heating Fuel and Equipment" "Natural Gas",58.2,14.7,4.6,10.1 "Central Warm-Air Furnace",44.7,11.4,4,7.4

Note: This page contains sample records for the topic "furnaces heat air" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Thermal Imaging Control of Furnaces and Combustors  

Science Conference Proceedings (OSTI)

The object if this project is to demonstrate and bring to commercial readiness a near-infrared thermal imaging control system for high temperature furnaces and combustors. The thermal imaging control system, including hardware, signal processing, and control software, is designed to be rugged, self-calibrating, easy to install, and relatively transparent to the furnace operator.

David M. Rue; Serguei Zelepouga; Ishwar K. Puri

2003-02-28T23:59:59.000Z

382

Mass and Heat Recovery  

E-Print Network (OSTI)

In the last few years heat recovery was under spot and in air conditioning fields usually we use heat recovery by different types of heat exchangers. The heat exchanging between the exhaust air from the building with the fresh air to the building (air to air heat exchanger). In my papers I use (water to air heat exchanger) as a heat recovery and I use the water as a mass recovery. The source of mass and heat recovery is the condensate water which we were dispose and connect it to the drain lines.

Hindawai, S. M.

2010-01-01T23:59:59.000Z

383

Contribution of Land Use Changes to Near-Surface Air Temperatures during Recent Summer Extreme Heat Events in the Phoenix Metropolitan Area  

Science Conference Proceedings (OSTI)

The impact of 1973–2005 land use–land cover (LULC) changes on near-surface air temperatures during four recent summer extreme heat events (EHEs) are investigated for the arid Phoenix, Arizona, metropolitan area using the Weather Research and ...

Susanne Grossman-Clarke; Joseph A. Zehnder; Thomas Loridan; C. Sue B. Grimmond

2010-08-01T23:59:59.000Z

384

Building Technologies Office: Residential Furnaces and Boilers Framework  

NLE Websites -- All DOE Office Websites (Extended Search)

Residential Furnaces Residential Furnaces and Boilers Framework Meeting to someone by E-mail Share Building Technologies Office: Residential Furnaces and Boilers Framework Meeting on Facebook Tweet about Building Technologies Office: Residential Furnaces and Boilers Framework Meeting on Twitter Bookmark Building Technologies Office: Residential Furnaces and Boilers Framework Meeting on Google Bookmark Building Technologies Office: Residential Furnaces and Boilers Framework Meeting on Delicious Rank Building Technologies Office: Residential Furnaces and Boilers Framework Meeting on Digg Find More places to share Building Technologies Office: Residential Furnaces and Boilers Framework Meeting on AddThis.com... About Standards & Test Procedures Implementation, Certification & Enforcement

385

Insulation of Pipe Bends Improves Efficiency of Hot Oil Furnaces  

E-Print Network (OSTI)

Thermodynamic analyses of processes indicated low furnace efficiencies on certain hot oil furnaces. Further investigation, which included Infrared (IR) thermography testing of several furnaces, identified extremely hot surfaces on the outside of the convective sections. Consultation with the furnace manufacturer then revealed that furnaces made in the 1960's tended to not insulate the pipe bends in the convective section. When insulation was added within the covers of the pipe bends on one furnace, the energy efficiency improved by approximately 11%. The total savings are approximately 14,000 Million Btu/yr on one furnace. Insulation will be applied to several other furnaces at the site.

Haseltine, D. M.; Laffitte, R. D.

1999-05-01T23:59:59.000Z

386

Load Preheating Using Flue Gases from a Fuel-Fired Heating System  

Science Conference Proceedings (OSTI)

This DOE Industrial Technologies Program tip sheet describes how to save energy and costs by using the heat in furnace flue gases to preheat material coming into the furnace to improve combustion.

Not Available

2006-01-01T23:59:59.000Z

387

A novel heat recovery technology from an Aluminum reduction cell ...  

Science Conference Proceedings (OSTI)

The experimental setup consists of an electrical furnace which provides the simulated hot side walls, the control and measurement instruments, the heat ...

388

AHEX-A New, Combined Waste Heat Recovery and Emission ...  

Science Conference Proceedings (OSTI)

Presentation Title, AHEX-A New, Combined Waste Heat Recovery and Emission Control System for Anode Bake Furnaces. Author(s), Anders Kenneth Sorhuus, ...

389

John A. Wamsley  

Science Conference Proceedings (OSTI)

... Sears, Roebuck & Co, Basic Electricity, Basic Electronics Controls, Heat Pumps, Refrigeration Repair, Electric Furnaces, Oil Furnace, Air ...

2012-07-06T23:59:59.000Z

390

Heat Exchangers  

Science Conference Proceedings (OSTI)

Table 16   Ceramic heat exchanger systems...Soaking pit 870â??1230 1600â??2250 Fe, Si, alkalis Solar Turbines â?¦ 4â??8 OD Ã? 180 long (440 tubes) Aluminum melt furnaces 1010 1850 Alkali salts Plate fin GTE 0.6, 1.6 25â??46 Multiple 870â??1370 1600â??2250 Clean (good), alkalis (poor) Coors 0.25, 1.0 30 Ã? 30 Ã? 46 Multiple Clean (good), alkalis (poor) Radiant...

391

Post combustion trials at Dofasco`s KOBM furnace  

DOE Green Energy (OSTI)

Post combustion trials were conducted at Dofasco`s 300 tonne KOBM furnace as part of the AISI Direct Steelmaking Program. The purpose of the project work was to measure the post combustion ratio (PCR) and heat transfer efficiency (HTE) of the post combustion reaction in a full size steelmaking vessel. A method of calculating PCR and HTE using off gas analysis and gas temperature was developed. The PCR and HTE were determined under normal operating conditions. Trials assessed the effect of lance height, vessel volume, foaming slag and pellet additions on PCR and HTE.

Farrand, B.L.; Wood, J.E.; Goetz, F.J.

1992-12-31T23:59:59.000Z

392

Development of the Household Sample for Furnace and Boiler Life-Cycle Cost  

NLE Websites -- All DOE Office Websites (Extended Search)

Development of the Household Sample for Furnace and Boiler Life-Cycle Cost Development of the Household Sample for Furnace and Boiler Life-Cycle Cost Analysis Title Development of the Household Sample for Furnace and Boiler Life-Cycle Cost Analysis Publication Type Report LBNL Report Number LBNL-55088 Year of Publication 2005 Authors Whitehead, Camilla Dunham, Victor H. Franco, Alexander B. Lekov, and James D. Lutz Document Number LBNL-55088 Pagination 22 Date Published May 31 Publisher Lawrence Berkeley National Laboratory City Berkeley Abstract Residential household space heating energy use comprises close to half of all residential energy consumption. Currently, average space heating use by household is 43.9 Mbtu for a year. An average, however, does not reflect regional variation in heating practices, energy costs, or fuel type. Indeed, a national average does not capture regional or consumer group cost impacts from changing efficiency levels of heating equipment. The US Department of Energy sets energy standards for residential appliances in, what is called, a rulemaking process. The residential furnace and boiler efficiency rulemaking process investigates the costs and benefits of possible updates to the current minimum efficiency regulations. Lawrence Berkeley National Laboratory (LBNL) selected the sample used in the residential furnace and boiler efficiency rulemaking from publically available data representing United States residences. The sample represents 107 million households in the country. The data sample provides the household energy consumption and energy price inputs to the life-cycle cost analysis segment of the furnace and boiler rulemaking. This paper describes the choice of criteria to select the sample of houses used in the rulemaking process. The process of data extraction is detailed in the appendices and is easily duplicated.The life-cycle cost is calculated in two ways with a household marginal energy price and a national average energy price. The LCC results show that using an national average energy price produces higher LCC savings but does not reflect regional differences in energy price.

393

Computational Fluid Dynamics Based Investigation of Sensitivity of Furnace Operational Conditions to Burner Flow Controls  

Science Conference Proceedings (OSTI)

As aggressive reductions in boiler emissions are mandated, the electric utility industry has been moving toward installation of improved methods of burner flow measurement and control to optimize combustion for reduced emissions. Development of cost effective controls requires an understanding of how variations in air and coal flows relate to emission rates. This project used computational fluid dynamic (CFD) modeling to quantify the impacts of variations of burner air and fuel flows on furnace operating...

2005-12-12T23:59:59.000Z

394

Two-dimensional model of the air flow and temperature distribution in a cavity-type heat receiver of a solar stirling engine  

SciTech Connect

A theoretical study on the air flow and temperature in the heat receiver, affected by free convection, of a Stirling Engine for a Dish/Stirling Engine Power System is presented. The standard {kappa}-{epsilon} turbulence model for the fluid flow has been used and the boundary conditions employed were obtained using a second level mathematical model of the Stirling Engine working cycle. Physical models for the distribution of the solar insolation from the Concentrator on the bottom and side walls of the cavity-type heat receiver have been taken into account. The numerical results show that most of the heat losses in the receiver are due to re-radiation from the cavity and conduction through the walls of the cavity. It is in the region of the boundary of the input window of the heat receiver where there is a sensible reduction in the temperature in the shell of the heat exchangers and this is due to the free convection of the air. Further, the numerical results show that convective heat losses increase with decreasing tilt angle.

Makhkamov, K.K.; Ingham, D.B.

1999-11-01T23:59:59.000Z

395

Ladle Refining Furnaces for the Steel Industry  

Science Conference Proceedings (OSTI)

There has been a tremendous interest in the use of ladle refining furnaces in the last few years. Several units have been or are being constructed in the United States and most steel companies are seriously considering installing them. The purpose of this report is to inform the member companies of EPRI of the development and operations of ladle furnaces and to assist steel companies in determining if ladle furnaces fit their goals and which particular unit would be best for their operation. In this repo...

1990-01-31T23:59:59.000Z

396

Assessment of thermal swing absorption alternatives for producing oxygen enriched combustion air  

SciTech Connect

It has been established that oxygen enriched combustion (OEC) can substantially improve the thermal efficiency and productivity of a furnace. An OEC performance study by the Union Carbide Corporation found that in furnaces with flue gas temperatures above 2,000{degree}F, a high level of oxygen (O{sub 2}) enrichment (50% to 100% O{sub 2}) will result in a 40% to 60% fuel savings. The US DOE's (Department of Energy) Office of Industrial Programs (OIP) has sponsored several research development projects and engineering assessments relevant to the production of oxygen enriched air (OEA) and its use in combustion systems. In an OIP-sponsored assessment of research and development opportunities for combustion technologies, Taratec Corporation indicated that thermal swing absorption (TSA) offers a potentially viable option for producing low-cost oxygen enriched combustion air (OECA). In fact, an integrated, TSA-based oxygen enriched air production system driven by waste heat from furnace exhaust may be more energy- and cost-efficient than the alternative technologies. The study presented in this document further investigates and assesses TSA alternatives for producing low-cost OECA. 7 refs., 4 figs., 5 tabs.

Not Available

1990-04-01T23:59:59.000Z

397

Deemed Savings Estimates for Legacy Air Conditioning and WaterHeating Direct Load Control Programs in PJM Region  

SciTech Connect

During 2005 and 2006, the PJM Interconnection (PJM) Load Analysis Subcommittee (LAS) examined ways to reduce the costs and improve the effectiveness of its existing measurement and verification (M&V) protocols for Direct Load Control (DLC) programs. The current M&V protocol requires that a PURPA-compliant Load Research study be conducted every five years for each Load-Serving Entity (LSE). The current M&V protocol is expensive to implement and administer particularly for mature load control programs, some of which are marginally cost-effective. There was growing evidence that some LSEs were mothballing or dropping their DLC programs in lieu of incurring the expense associated with the M&V. This project had several objectives: (1) examine the potential for developing deemed savings estimates acceptable to PJM for legacy air conditioning and water heating DLC programs, and (2) explore the development of a collaborative, regional, consensus-based approach for conducting monitoring and verification of load reductions for emerging load management technologies for customers that do not have interval metering capability.

Goldman, Charles

2007-03-01T23:59:59.000Z

398

Recovery Act: ArcelorMittal USA Blast Furnace Gas Flare Capture  

SciTech Connect

The U.S. Department of Energy (DOE) awarded a financial assistance grant under the American Recovery and Reinvestment Act of 2009 (Recovery Act) to ArcelorMittal USA, Inc. (ArcelorMittal) for a project to construct and operate a blast furnace gas recovery boiler and supporting infrastructure at ArcelorMittal’s Indiana Harbor Steel Mill in East Chicago, Indiana. Blast furnace gas (BFG) is a by-product of blast furnaces that is generated when iron ore is reduced with coke to create metallic iron. BFG has a very low heating value, about 1/10th the heating value of natural gas. BFG is commonly used as a boiler fuel; however, before installation of the gas recovery boiler, ArcelorMittal flared 22 percent of the blast furnace gas produced at the No. 7 Blast Furnace at Indiana Harbor. The project uses the previously flared BFG to power a new high efficiency boiler which produces 350,000 pounds of steam per hour. The steam produced is used to drive existing turbines to generate electricity and for other requirements at the facility. The goals of the project included job creation and preservation, reduced energy consumption, reduced energy costs, environmental improvement, and sustainability.

Seaman, John

2013-01-14T23:59:59.000Z

399

Methods of Increasing Thermal Efficiency of a Counter Flow Air to Air Heat Exchanger. An investigation of parameters influence on the thermal efficiency.  

E-Print Network (OSTI)

??In passive and low-energy houses the energy consumption of the heating system should be minimized in order to meet the standards of such houses. The… (more)

Pihlquist, Fredrik

2011-01-01T23:59:59.000Z

400

Geothermal Energy Development in the Eastern United States: Technical assistance report No. 6 geothermal space heating and airconditioning -- McGuire Air Force Base, New Jersey  

DOE Green Energy (OSTI)

A method of utilizing the geothermal (66 F) water resource for space heating and cooling of 200 of the 1452 housing units at McGuire AFB is suggested. Using projections of future costs of gas, coal and electricity made by DOD and by industry (Westinghouse), the relative costs of the geothermal-water-plus-heat-pump system and the otherwise-planned central gas heating (to be converted to coal in 1984) and air-conditioning (using individual electric units) system are compared. For heating with the geothermal/heat-pump system, an outlet temperature of 130 F is selected, requiring a longer running time than the conventional system (at 180 F) but permitting a COP (coefficient of performance) of the heat pump of about 3.4. For cooling (obtained in this study by changing directions of water flow, not refrigerant cycles), the change in temperature is less, and a COP near 4.5 is obtained. The cost of cooling in the summer months would be significantly less than the cost of using individual electric air-conditioners. Thus, by using nonreversible heat pumps, geothermal water is used to heat and to cool a section of the housing compound, minimizing operating expenditures. It is estimated that, to drill 1000 ft deep production and reinjection wells and to install ten heat pumps, heat exchangers and piping, would require a capital outlay of $643 K. This cost would replace the capital cost of purchasing and installing 200 air-conditioning units and 14% of the cost of the future coal-fired central heating system (which would otherwise serve all 1452 housing units at McGuire). The net additional capital outlay would be $299 K, which could be amortized in 10 years by the lower operating cost of the geothermal system if electricity and coal prices escalate as industry suggests. If the coal and electricity costs rise at the more modest rates that DOD projects, the capital costs would be amortized in a 15 year period.

Hill, F.K.; Briesen R. von

1980-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "furnaces heat air" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Retrofit Air Preheat Economics  

E-Print Network (OSTI)

Retrofit air preheat systems are the most reliable and efficient means to effect significant energy conservation for large existing industrial furnaces. Units can be quickly installed without a lengthy shutdown, and the furnace efficiency can be increased to a range of 89% to 92%. The economic justification for the addition of this equipment is presented in new total investment curves and simple payout curves for a range of fuel cost. This will enable the owner to quickly determine the preliminary feasibility and conceptual requirements for his project before proceeding with more vigorous work.

Goolsbee, J. A.

1981-01-01T23:59:59.000Z

402

Energy Basics: Ductless, Mini-Split Heat Pumps  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Systems Air-Source Heat Pumps Ductless Mini-Split Heat Pumps Absorption Heat Pumps Geothermal Heat Pumps Supporting Equipment for Heating & Cooling Systems Water Heating...

403

Heating Facilities, Virginia Lake Townhouses and Apartments, Reno, Nevada.  

DOE Green Energy (OSTI)

The Virginia Lake Townhouses and Apartments are located in a 12 acre parcel in the geographic center of Reno, Nevada. There are 148 apartments, consisting of 70 single story garden apartments in 10 buildings, 40 two story townhouses in six buildings, and 38 two story apartments in five buildings. All apartments are presently heated with individual natural gas fired forced air furnaces. Hot water is provided by gas fired water heaters, except for the 40 older townhouses which are using water directly from a geothermal source. This water has now been found to be unsuitable for potable use. Located on the property are two geothermal wells, complete with pumps. The larger well can deliver 500 gallons per min., and the smaller well 65 gallons per min., of the 135/sup 0/F geothermal water. The Geo-Heat Utilization Center has been asked to determine a scheme for using the geothermal water from these wells to provide the needed space and hot water heating for the 148 apartments. An outdoor swimming pool also requires heating. Space heating in all three types of apartments will be accomplished through the installation of finned water coils in existing ductwork or furnaces. Geothermal water will be pumped from Well No. 2 through a main distribution system and used directly in the coils. Piping system specifics are available in the Appendix.

Not Available

1980-03-01T23:59:59.000Z

404

Optical Furnace offers improved semiconductor device ...  

This means that the furnace is almost immune to the contamination from hot walls of ... NREL 94-26 US 5,897,331 High Efficiency Low Cost Thin Film ...

405

Modeling Energy Consumption of Residential Furnaces and Boilers...  

NLE Websites -- All DOE Office Websites (Extended Search)

6. American Society of Heating Refrigeration and Air-Conditioning Engineers, ASHRAE 1997 Handbook - Fundamentals. 1997, Atlanta, GA.p. 3.12. 7. Proctor, J. and D. Parker, Hidden...

406

Integrating Coal Gasification into a Rotary Kiln Electric Furnace Plant  

Science Conference Proceedings (OSTI)

Coal gasification is a potential alternative to conventional coal or natural gas- fired power plants ... Fundamentals of Spark-Plasma Sintering: Net-Shaping and Size Effects ... Investigation on a Microwave High-Temperature Air Heat Exchanger.

407

Economics of Condensing Gas Furnaces and Water Heaters Potential in Residential Single Family Homes  

SciTech Connect

Residential space and water heating accounts for over 90percent of total residential primary gas consumption in the United States. Condensing space and water heating equipment are 10-30percent more energy-efficient than conventional space and water heating. Currently, condensing gas furnaces represent 40 percent of shipments and are common in the Northern U.S. market. Meanwhile, manufacturers are planning to develop condensing gas storage water heaters to qualify for Energy Star? certification. Consumers, installers, and builders who make decisions about installing space and water heating equipment generally do not perform an analysis to assess the economic impacts of different combinations and efficiencies of space and water heating equipment. Thus, equipment is often installed without taking into consideration the potential life-cycle economic and energy savings of installing space and water heating equipment combinations. Drawing on previous and current analysis conducted for the United States Department of Energy rulemaking on amended standards for furnaces and water heaters, this paper evaluates the extent to which condensing equipment can provide life-cycle cost-effectiveness in a representative sample of single family American homes. The economic analyses indicate that significant energy savings and consumer benefits may result from large-scale introduction of condensing water heaters combined with condensing furnaces in U.S. residential single-family housing, particularly in the Northern region. The analyses also shows that important benefits may be overlooked when policy analysts evaluate the impact of space and water heating equipment separately.

Lekov, Alex; Franco, Victor; Meyers, Steve

2010-05-14T23:59:59.000Z

408

Influence of Air-Conditioning Waste Heat on Air Temperature in Tokyo during Summer: Numerical Experiments Using an Urban Canopy Model Coupled with a Building Energy Model  

Science Conference Proceedings (OSTI)

A coupled model consisting of a multilayer urban canopy model and a building energy analysis model has been developed to investigate the diurnal variations of outdoor air temperature in the office areas of Tokyo, Japan. Observations and numerical ...

Yukitaka Ohashi; Yutaka Genchi; Hiroaki Kondo; Yukihiro Kikegawa; Hiroshi Yoshikado; Yujiro Hirano

2007-01-01T23:59:59.000Z

409

Central Air Conditioners","Heat Pumps","Individual Air Conditioners","District Chilled Water","Central Chillers","Packaged  

U.S. Energy Information Administration (EIA) Indexed Site

5. Cooling Equipment, Floorspace, 1999" 5. Cooling Equipment, Floorspace, 1999" ,"Total Floorspace (million square feet)" ,"All Buildings","All Cooled Buildings","Cooling Equipment (more than one may apply)" ,,,"Residential-Type Central Air Conditioners","Heat Pumps","Individual Air Conditioners","District Chilled Water","Central Chillers","Packaged Air Conditioning Units","Swamp Coolers","Other" "All Buildings ................",67338,58474,8329,9147,14276,2750,12909,36527,2219,1312 "Building Floorspace" "(Square Feet)" "1,001 to 5,000 ...............",6774,4879,890,700,962,"Q","Q",2613,253,"Q" "5,001 to 10,000 ..............",8238,6212,1606,707,1396,"Q","Q",3197,181,"Q"

410

List of Heat pumps Incentives | Open Energy Information  

Open Energy Info (EERE)

pumps Incentives pumps Incentives Jump to: navigation, search The following contains the list of 1213 Heat pumps Incentives. CSV (rows 1-500) CSV (rows 501-1000) CSV (rows 1001-1213) Incentive Incentive Type Place Applicable Sector Eligible Technologies Active AEP (Central and North) - CitySmart Program (Texas) Utility Rebate Program Texas Commercial Industrial Institutional Local Government Schools Boilers Central Air conditioners Chillers Comprehensive Measures/Whole Building Custom/Others pending approval Energy Mgmt. Systems/Building Controls Furnaces Heat pumps Lighting Lighting Controls/Sensors Motor VFDs Motors Roofs Windows Yes AEP (Central and SWEPCO) - Coolsaver A/C Tune Up (Texas) Utility Rebate Program Texas Commercial Installer/Contractor Residential Central Air conditioners

411

International Energy Agency Building Energy Simulation Test and Diagnostic Method for Heating, Ventilating, and Air-Conditioning Equipment Models (HVAC BESTEST); Volume 1: Cases E100-E200  

DOE Green Energy (OSTI)

This report describes the Building Energy Simulation Test for Heating, Ventilating, and Air-Conditioning Equipment Models (HVAC BESTEST) project conducted by the Tool Evaluation and Improvement International Energy Agency (IEA) Experts Group. The group was composed of experts from the Solar Heating and Cooling (SHC) Programme, Task 22, Subtask A. The current test cases, E100-E200, represent the beginning of work on mechanical equipment test cases; additional cases that would expand the current test suite have been proposed for future development.

Neymark, J.; Judkoff, R.

2002-01-01T23:59:59.000Z

412

Conditions for making direct reduced iron, transition direct reduced iron and pig iron nuggets in a laboratory furnace - Temperature-time transformations  

Science Conference Proceedings (OSTI)

The pig iron nugget process is gaining in importance as an alternative to the traditional blast furnace. Throughout the process, self-reducing-fluxing dried greenballs composed of iron ore concentrate, reducing-carburizing agent (coal), flux (limestone) and binder (bentonite) are heat-treated. During the heat treatment, dried greenballs are first transformed into direct reduced iron (DRI), then to transition direct reduced iron (TDRI) and finally to pig iron nuggets. The furnace temperature and/or residence time and the corresponding levels of carburization, reduction and metallization dictate these transformations. This study involved the determination of threshold furnace temperatures and residence times for completion of all of the transformation reactions and pig iron nugget production. The experiments involved the heat treatment of self-reducing-fluxing dried greenballs at various furnace temperatures and residence times. The products of these heat treatments were identified by utilizing optical microscopy, apparent density and microhardness measurements.

Anameric, B.; Kawatra, S.K. [Michigan Technological University, Houghton, MI (United States). Dept. of Chemical Engineering

2007-02-15T23:59:59.000Z

413

A numerical study of transient ignition and flame characteristics of diluted hydrogen versus heated air in counterflow  

Science Conference Proceedings (OSTI)

Combined experimental and numerical studies of the transient response of ignition to strained flows require a well-characterized ignition trigger. Laser deposition of a small radical pool provides a reliable method for initiating ignition of mixtures that are near the ignition limit. Two-dimensional direct numerical simulations are used to quantify the sensitivity of ignition kernel formation and subsequent edge-flame propagation to the oxidizer temperature and the initial width and amplitude of O-atom deposition used to trigger ignition in an axisymmetric counterflow of heated air versus ambient hydrogen/nitrogen. The ignition delay and super-equilibrium OH concentration in the nascent ignition kernel are highly sensitive to variations in these initial conditions. The ignition delay decreases as the amplitude of the initial O-atom deposition increases. The spatial distribution and the magnitude of the OH overshoot are governed by multi-dimensional effects. The degree of OH overshoot near the burner centerline increases as the diameter of the initial O-atom deposition region decreases. This result is attributed to preferential diffusion of hydrogen in the highly curved leading portion of the edge flame that is established following thermal runaway. The edge-flame speed and OH overshoot at the leading edge of the edge flame are relatively insensitive to variations in the initial conditions of the ignition. The steady edge-flame speed is approximately twice the corresponding laminar flame speed. The rate at which the edge flame approaches its steady state is insensitive to the initial conditions and depends solely on the diffusion time scale at the edge flame. The edge flame is curved toward the heated oxidizer stream as a result of differences in the chemical kinetics between the leading edge and the trailing diffusion flame. The structure of the highly diluted diffusion flame considered in this study corresponds to Linan's 'premixed flame regime' in which only the oxidizer leaks through the reaction zone such that the flame is located at fuel lean rather than stoichiometric mixture fraction conditions. (author)

Yoo, Chun Sang; Chen, Jacqueline H. [Combustion Research Facility, Sandia National Laboratories, Livermore, CA 94551-0969 (United States); Frank, Jonathan H.

2009-01-15T23:59:59.000Z

414

A numerical study of transient ignition and flame characteristics of diluted hydrogen versus heated air in counterflow  

Science Conference Proceedings (OSTI)

Combined experimental and numerical studies of the transient response of ignition to strained flows require a well-characterized ignition trigger. Laser deposition of a small radical pool provides a reliable method for initiating ignition of mixtures that are near the ignition limit. Two-dimensional direct numerical simulations are used to quantify the sensitivity of ignition kernel formation and subsequent edge-flame propagation to the oxidizer temperature and the initial width and amplitude of O-atom deposition used to trigger ignition in an axisymmetric counterflow of heated air versus ambient hydrogen/nitrogen. The ignition delay and super-equilibrium OH concentration in the nascent ignition kernel are highly sensitive to variations in these initial conditions. The ignition delay decreases as the amplitude of the initial O-atom deposition increases. The spatial distribution and the magnitude of the OH overshoot are governed by multi-dimensional effects. The degree of OH overshoot near the burner centerline increases as the diameter of the initial O-atom deposition region decreases. This result is attributed to preferential diffusion of hydrogen in the highly curved leading portion of the edge flame that is established following thermal runaway. The edge-flame speed and OH overshoot at the leading edge of the edge flame are relatively insensitive to variations in the initial conditions of the ignition. The steady edge-flame speed is approximately twice the corresponding laminar flame speed. The rate at which the edge flame approaches its steady state is insensitive to the initial conditions and depends solely on the diffusion time scale at the edge flame. The edge flame is curved toward the heated oxidizer stream as a result of differences in the chemical kinetics between the leading edge and the trailing diffusion flame. The structure of the highly diluted diffusion flame considered in this study corresponds to Linan's 'premixed flame regime' in which only the oxidizer leaks through the reaction zone such that the flame is located at fuel lean rather than stoichiometric mixture fraction conditions. (author)

Yoo, Chun Sang; Chen, Jacqueline H.; Frank, Jonathan H. [Combustion Research Facility, Sandia National Laboratories, Livermore, CA 94551-0969 (United States)

2008-11-15T23:59:59.000Z

415

A numerical study of transient ignition and flame characteristics of diluted hydrogen versus heated air in counterflow.  

SciTech Connect

Combined experimental and numerical studies of the transient response of ignition to strained flows require a well-characterized ignition trigger. Laser deposition of a small radical pool provides a reliable method for initiating ignition of mixtures that are near the ignition limit. Two-dimensional direct numerical simulations are used to quantify the sensitivity of ignition kernel formation and subsequent edge-flame propagation to the oxidizer temperature and the initial width and amplitude of O-atom deposition used to trigger ignition in an axisymmetric counterflow of heated air versus ambient hydrogen/nitrogen. The ignition delay and super-equilibrium OH concentration in the nascent ignition kernel are highly sensitive to variations in these initial conditions. The ignition delay decreases as the amplitude of the initial O-atom deposition increases. The spatial distribution and the magnitude of the OH overshoot are governed by multi-dimensional effects. The degree of OH overshoot near the burner centerline increases as the diameter of the initial O-atom deposition region decreases. This result is attributed to preferential diffusion of hydrogen in the highly curved leading portion of the edge flame that is established following thermal runaway. The edge-flame speed and OH overshoot at the leading edge of the edge flame are relatively insensitive to variations in the initial conditions of the ignition. The steady edge-flame speed is approximately twice the corresponding laminar flame speed. The rate at which the edge flame approaches its steady state is insensitive to the initial conditions and depends solely on the diffusion time scale at the edge flame. The edge flame is curved toward the heated oxidizer stream as a result of differences in the chemical kinetics between the leading edge and the trailing diffusion flame. The structure of the highly diluted diffusion flame considered in this study corresponds to Linan's 'premixed flame regime' in which only the oxidizer leaks through the reaction zone such that the flame is located at fuel lean rather than stoichiometric mixture fraction conditions.

Yoo, Chun Sang; Chen, Jacqueline H.; Frank, Jonathan H.

2008-08-01T23:59:59.000Z

416

Energy Basics: Furnaces and Boilers  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

a vessel or tank where heat produced from the combustion of such fuels as natural gas, fuel oil, or coal is used to generate hot water or steam. Many buildings have their own...

417

Researching Complex Heat, Air and Moisture Interactions for a Wide-Range of Building Envelope Systems and Environmental Loads  

Science Conference Proceedings (OSTI)

This document serves as the final report documenting work completed by Oak Ridge National Laboratory (ORNL) and the Fraunhofer Institute in Building Physics (Holzkirchen, Germany) under an international CRADA No. 0575 with Fraunhofer Institute of Bauphysics of the Federal Republic of Germany for Researching Complex Heat, Air and Moisture Interactions for a Wide Range of Building Envelope Systems and Environmental Loads. This CRADA required a multi-faceted approach to building envelope research that included a moisture engineering approach by blending extensive material property analysis, laboratory system and sub-system thermal and moisture testing, and advanced moisture analysis prediction performance. The Participant's Institute for Building physics (IBP) and the Contractor's Buildings Technology Center (BTC) identified potential research projects and activities capable of accelerating and advancing the development of innovative, low energy and durable building envelope systems in diverse climates. This allowed a major leverage of the limited resources available to ORNL to execute the required Department of Energy (DOE) directives in the area of moisture engineering. A joint working group (ORNL and Fraunhofer IBP) was assembled and a research plan was executed from May 2000 to May 2005. A number of key deliverables were produced such as adoption of North American loading into the WUFI-software. in addition the ORNL Weather File Analyzer was created and this has been used to address environmental loading for a variety of US climates. At least 4 papers have been co-written with the CRADA partners, and a chapter in the ASTM Manual 40 on Moisture Analysis and Condensation Control. All deliverables and goals were met and exceeded making this collaboration a success to all parties involves.

Karagiozis, A.N.

2007-05-15T23:59:59.000Z

418

Results of heat tests of the TGE-435 main boiler in the PGU-190/220 combined-cycle plant of the Tyumen' TETs-2 cogeneration plant  

Science Conference Proceedings (OSTI)

Special features of operation of a boiler operating as a combined-cycle plant and having its own furnace and burner unit are descried. The flow of flue gases on the boiler is increased due to feeding of exhaust gases of the GTU into the furnace, which intensifies the convective heat exchange. In addition, it is not necessary to preheat air in the convective heating surfaces (the boiler has no air preheater). The convective heating surfaces of the boiler are used for heating the feed water, thus replacing the regeneration extractions of the steam turbine (HPP are absent in the circuit) and partially replacing the preheating of condensate (the LPP in the circuit of the unit are combined with preheaters of delivery water). Regeneration of the steam turbine is primarily used for the district cogeneration heating purposes. The furnace and burner unit of the exhaust-heat boiler (which is a new engineering solution for the given project) ensures utilization of not only the heat of the exhaust gases of the GTU but also of their excess volume, because the latter contains up to 15% oxygen that oxidizes the combustion process in the boiler. Thus, the gas temperature at the inlet to the boiler amounts to 580{sup o}C at an excess air factor a = 3.50; at the outlet these parameters are utilized to T{sub out} = 139{sup o}C and a{sub out} = 1.17. The proportions of the GTU/boiler loads that can actually be organized at the generating unit (and have been checked by testing) are presented and the proportions of loads recommended for the most efficient operation of the boiler are determined. The performance characteristics of the boiler are presented for various proportions of GTU/boiler loads. The operating conditions of the superheater and of the convective trailing heating surfaces are presented as well as the ecological parameters of the generating unit.

A.V. Kurochkin; A.L. Kovalenko; V.G. Kozlov; A.I. Krivobok [Engineering Center of the Ural Power Industry (Russian Federation)

2007-01-15T23:59:59.000Z

419

Coal combustion under conditions of blast furnace injection; [Quarterly] technical report, September 1--November 30, 1993  

SciTech Connect

A potentially new use for Illinois coal is its use as a fuel injected into a blast furnace to produce molten iron as the first step in steel production. Because of its increasing cost and decreasing availability, metallurgical coke is now being replaced by coal injected at the tuyere area of the furnace where the blast air enters. The purpose of this study is to evaluate the combustion of coal during the blast furnace injection process and to delineate the optimum properties of the feed coal. This investigation is significant to the use of Illinois coal in that the limited research to date suggests that coals of low fluidity and moderate to high sulfur and chlorine contents are suitable feedstocks for blast furnace injection. This study is unique in that it will be the first North American effort to directly determine the nature of the combustion of coal injected into a blast furnace. This proposal is a follow-up to one funded for the 1992--1993 period. It is intended to complete the study already underway with the Armco Inc. steel company and to initiate a new cooperative study along somewhat similar lines with the Inland Steel Company. The results of this study will lead to the development of a testing and evaluation protocol that will give a unique and much needed understanding of the behavior of coal in the injection process and prove the potential of Illinois coals f or such use.

Crelling, J.C.

1993-12-31T23:59:59.000Z

420

Lamella Refining Mechanism of TiAl-based Alloys by Different Heat ...  

Science Conference Proceedings (OSTI)

... 1450? by different ways, like furnace cooling, air cooling and oil quenching. ... Study Of The Effect Of Machine Induced Notch And Foreign Object Damage ...

Note: This page contains sample records for the topic "furnaces heat air" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Estimation of radiative properties and temperature distributions in coal-fired boiler furnaces by a portable image processing system  

Science Conference Proceedings (OSTI)

This paper presented an experimental investigation on the estimation of radiative properties and temperature distributions in a 670 t/h coal-fired boiler furnace by a portable imaging processing system. The portable system has been calibrated by a blackbody furnace. Flame temperatures and emissivities were measured by the portable system and equivalent blackbody temperatures were deduced. Comparing the equivalent blackbody temperatures measured by the portable system and the infrared pyrometer, the relative difference is less than 4%. The reconstructed pseudo-instantaneous 2-D temperature distributions in two cross-sections can disclose the combustion status inside the furnace. The measured radiative properties of particles in the furnace proved there is significant scattering in coal-fired boiler furnaces and it can provide useful information for the calculation of radiative heat transfer and numerical simulation of combustion in coal-fired boiler furnaces. The preliminary experimental results show this technology will be helpful for the combustion diagnosis in coal-fired boiler furnaces. (author)

Li, Wenhao; Lou, Chun; Sun, Yipeng; Zhou, Huaichun [State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan, 430074 Hubei (China)

2011-02-15T23:59:59.000Z

422

FURNACE INJECTION OF ALKALINE SORBENTS FOR SULFURIC ACID REMOVAL  

Science Conference Proceedings (OSTI)

The objective of this project has been to demonstrate the use of alkaline reagents injected into the furnace of coal-fired boilers as a means of controlling sulfuric acid emissions. The project was co-funded by the U.S. DOE National Energy Technology Laboratory under Cooperative Agreement DE-FC26-99FT40718, along with EPRI, the American Electric Power Company (AEP), FirstEnergy Corporation, the Tennessee Valley Authority, and Carmeuse North America. Sulfuric acid controls are becoming of increased interest for coal-fired power generating units for a number of reasons. In particular, sulfuric acid can cause plant operation problems such as air heater plugging and fouling, back-end corrosion, and plume opacity. These issues will likely be exacerbated with the retrofit of selective catalytic reduction (SCR) for NOX control, as SCR catalysts are known to further oxidize a portion of the flue gas SO{sub 2} to SO{sub 3}. The project tested the effectiveness of furnace injection of four different magnesium-based or dolomitic alkaline sorbents on full-scale utility boilers. These reagents were tested during one- to two-week tests conducted on two FirstEnergy Bruce Mansfield Plant (BMP) units. One of the sorbents tested was a magnesium hydroxide slurry byproduct from a modified Thiosorbic{reg_sign} Lime wet flue gas desulfurization process. The other three sorbents are available commercially and include dolomite, pressure-hydrated dolomitic lime, and commercially available magnesium hydroxide. The dolomite reagent was injected as a dry powder through out-of-service burners. The other three reagents were injected as slurries through air-atomizing nozzles inserted through the front wall of the upper furnace. After completing the four one- to two-week tests, the most promising sorbents were selected for longer-term (approximately 25-day) full-scale tests on two different units. The longer-term tests were conducted to confirm sorbent effectiveness over extended operation on two different boilers, and to determine balance-of-plant impacts. The first long-term test was conducted on FirstEnergy's BMP Unit 3, and the second was conducted on AEP's Gavin Plant, Unit 1. The Gavin Plant test provided an opportunity to evaluate the effects of sorbent injected into the furnace on SO{sub 3} formed across an operating SCR reactor. A final task in the project was to compare projected costs for furnace injection of magnesium hydroxide slurries to estimated costs for other potential sulfuric acid control technologies. Estimates were developed for reagent and utility costs, and capital costs, for furnace injection of magnesium hydroxide slurries and seven other sulfuric acid control technologies. The estimates were based on retrofit application to a model coal-fired plant.

Gary M. Blythe

2004-01-01T23:59:59.000Z

423

Dehumidification Performance of Air Conditioning Systems in Supermarkets: Field Demonstration with Heat Pipe Heat Exchangers in Delchamps Supermarket, Gulf Breeze, Florida  

Science Conference Proceedings (OSTI)

Lower humidity in supermarkets translates to reduced operational cost from refrigeration equipment. A demonstration project at a Florida supermarket showed that use of a heat pipe heat exchanger (HPHX) improved the HVAC system's dehumidification performance; but lower airflow rates, with or without an HPHX, also provided significant dehumidification enhancements.

1996-07-27T23:59:59.000Z

424

Heat reclaimer  

Science Conference Proceedings (OSTI)

A device for reclaiming heat from stove pipes and the like. A semi-circular shaped hollow enclosed housing with a highly thermal-conductive concave surface is mounted contactingly to surround approximately one-half of the circumference of the stove pipe. The concave surface is formed to contact the pipe at a maximum number of points along that surface. The hollow interior of the housing contains thin multi-surfaced projections which are integral with the concave surface and conductively transfer heat from the stove pipe and concave surface to heat the air in the housing. A fan blower is attached via an air conduit to an entrance opening in the housing. When turned on, the blower pushes the heated interior air out a plurality of air exit openings in the ends of the housing and brings in lower temperature outside air for heating.

Parham, F.

1985-04-09T23:59:59.000Z

425

Heat pump system  

DOE Patents (OSTI)

An air heating and cooling system for a building includes an expansion-type refrigeration circuit and a heat engine. The refrigeration circuit includes two heat exchangers, one of which is communicated with a source of indoor air from the building and the other of which is communicated with a source of air from outside the building. The heat engine includes a heat rejection circuit having a source of rejected heat and a primary heat exchanger connected to the source of rejected heat. The heat rejection circuit also includes an evaporator in heat exchange relation with the primary heat exchanger, a heat engine indoor heat exchanger, and a heat engine outdoor heat exchanger. The indoor heat exchangers are disposed in series air flow relationship, with the heat engine indoor heat exchanger being disposed downstream from the refrigeration circuit indoor heat exchanger. The outdoor heat exchangers are also disposed in series air flow relationship, with the heat engine outdoor heat exchanger disposed downstream from the refrigeration circuit outdoor heat exchanger. A common fluid is used in both of the indoor heat exchanges and in both of the outdoor heat exchangers. In a first embodiment, the heat engine is a Rankine cycle engine. In a second embodiment, the heat engine is a non-Rankine cycle engine.

Swenson, Paul F. (Cleveland, OH); Moore, Paul B. (Fedhaurn, FL)

1982-01-01T23:59:59.000Z

426

Heat pump system  

DOE Patents (OSTI)

An air heating and cooling system for a building includes an expansion-type refrigeration circuit and a heat engine. The refrigeration circuit includes two heat exchangers, one of which is communicated with a source of indoor air from the building and the other of which is communicated with a source of air from outside the building. The heat engine includes a heat rejection circuit having a source of rejected heat and a primary heat exchanger connected to the source of rejected heat. The heat rejection circuit also includes an evaporator in heat exchange relation with the primary heat exchanger, a heat engine indoor heat exchanger, and a heat engine outdoor heat exchanger. The indoor heat exchangers are disposed in series air flow relationship, with the heat engine indoor heat exchanger being disposed downstream from the refrigeration circuit indoor heat exchanger. The outdoor heat exchangers are also disposed in series air flow relationship, with the heat engine outdoor heat exchanger disposed downstream from the refrigeration circuit outdoor heat exchanger. A common fluid is used in both of the indoor heat exchangers and in both of the outdoor heat exchangers. In a first embodiment, the heat engine is a Rankine cycle engine. In a second embodiment, the heat engine is a non-Rankine cycle engine.

Swenson, Paul F. (Cleveland, OH); Moore, Paul B. (Fedhaurn, FL)

1979-01-01T23:59:59.000Z

427

Solar heat collector  

Science Conference Proceedings (OSTI)

A solar heat collector is described that pre-heats water for a household hot water heating system, and also heats the air inside a house. The device includes solar heating panels set into an A-shape, and enclosing an area therein containing a water tank and a wristatic fan that utilize the heat of the enclosed air, and transmit the thermal energy therefrom through a water line and an air line into the house.

Sykes, A.B.

1981-07-28T23:59:59.000Z

428

Integrated Heat Pump (IHP) System Development - Air-Source IHP Control Strategy and Specifications and Ground-Source IHP Conceptual Design  

SciTech Connect

The integrated heat pump (IHP), as one appliance, can provide space cooling, heating, ventilation, and dehumidification while maintaining comfort and meeting domestic water heating needs in near-zero-energy home (NZEH) applications. In FY 2006 Oak Ridge National Laboratory (ORNL) completed development of a control strategy and system specification for an air-source IHP. The conceptual design of a ground-source IHP was also completed. Testing and analysis confirm the potential of both IHP concepts to meet NZEH energy services needs while consuming 50% less energy than a suite of equipment that meets current minimum efficiency requirements. This report is in fulfillment of an FY06 DOE Building Technologies (BT) Joule Milestone.

Murphy, Richard W [ORNL; Rice, C Keith [ORNL; Baxter, Van D [ORNL

2007-05-01T23:59:59.000Z

429

Co-combustion of refuse derived fuel and coal in a cyclone furnace at the Baltimore Gas and Electric Company, C. P. Crane Station  

DOE Green Energy (OSTI)

A co-combustion demonstration burn of coal and fluff refuse-derived fuel (RDF) was conducted by Teledyne National and Baltimore Gas and Electric Company. This utility has two B and W cyclone furnaces capable of generating 400 MW. The facility is under a prohibition order to convert from No. 6 oil to coal; as a result, it was desirable to demonstrate that RDF, which has a low sulfur content, can be burned in combination with coals containing up to 2% sulfur, thus reducing overall sulfur emissions without deleterious effects. Each furnace consists of four cyclones capable of generating 1,360,000 pounds per hour steam. The tertiary air inlet of one of the cyclones was modified with an adapter to permit fluff RDF to be pneumatically blown into the cyclone. At the same time, coal was fed into the cyclone furnace through the normal coal feeding duct, where it entered the burning chamber tangentially and mixed with the RDF during the burning process. Secondary shredded fluff RDF was prepared by the Baltimore County Resource Recovery Facility. The RDF was discharged into a receiving station consisting of a belt conveyor discharging into a lump breaker, which in turn, fed the RDF into a pneumatic line through an air-lock feeder. A total of 2316 tons were burned at an average rate of 5.6 tons per hour. The average heat replacement by RDF for the cyclone was 25%, based on Btu input for a period of forty days. The range of RDF burned was from 3 to 10 tons per hour, or 7 to 63% heat replacement. The average analysis of the RDF (39 samples) for moisture, ash, heat (HHV) and sulfur content were 18.9%, 13.4%, 6296 Btu/lb and 0.26% respectively. RDF used in the test was secondary shredded through 1-1/2 inch grates producing the particle size distribution of from 2 inches to .187 inches. Findings to date after inspection of the boiler and superheater indicate satisfactory results with no deleterious effects from the RDF.

Not Available

1982-03-01T23:59:59.000Z

430

My Energy Audit, Part 1: Heating | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

My Energy Audit, Part 1: Heating My Energy Audit, Part 1: Heating My Energy Audit, Part 1: Heating June 6, 2012 - 2:05pm Addthis Stephanie Price Communicator, National Renewable Energy Laboratory My utility company offers a free energy audit, of which I finally took advantage. It was mostly discussion about different ways to save energy, with inspection of a few areas of the house (not quite as comprehensive as the utility company's website indicated it would be, but it was, after all, free). The auditor had a table of my electric bills for the last two years (I forgot to ask for a copy, but I've got several years' worth of bills, and I've started to create my own table anyway). It clearly showed that my winter bills are very high compared to my summer bills. Since I don't have air conditioning, the difference is primarily due to furnace use during the

431

My Energy Audit, Part 1: Heating | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

My Energy Audit, Part 1: Heating My Energy Audit, Part 1: Heating My Energy Audit, Part 1: Heating June 6, 2012 - 2:05pm Addthis Stephanie Price Communicator, National Renewable Energy Laboratory My utility company offers a free energy audit, of which I finally took advantage. It was mostly discussion about different ways to save energy, with inspection of a few areas of the house (not quite as comprehensive as the utility company's website indicated it would be, but it was, after all, free). The auditor had a table of my electric bills for the last two years (I forgot to ask for a copy, but I've got several years' worth of bills, and I've started to create my own table anyway). It clearly showed that my winter bills are very high compared to my summer bills. Since I don't have air conditioning, the difference is primarily due to furnace use during the

432

List of Heat pumps Incentives | Open Energy Information  

Open Energy Info (EERE)

pumps Incentives pumps Incentives (Redirected from List of Heat Pumps Incentives) Jump to: navigation, search The following contains the list of 1213 Heat pumps Incentives. CSV (rows 1-500) CSV (rows 501-1000) CSV (rows 1001-1213) Incentive Incentive Type Place Applicable Sector Eligible Technologies Active AEP (Central and North) - CitySmart Program (Texas) Utility Rebate Program Texas Commercial Industrial Institutional Local Government Schools Boilers Central Air conditioners Chillers Comprehensive Measures/Whole Building Custom/Others pending approval Energy Mgmt. Systems/Building Controls Furnaces Heat pumps Lighting Lighting Controls/Sensors Motor VFDs Motors Roofs Windows Yes AEP (Central and SWEPCO) - Coolsaver A/C Tune Up (Texas) Utility Rebate Program Texas Commercial

433

Thermally conductive cementitious grout for geothermal heat pump systems  

DOE Patents (OSTI)

A thermally conductive cement-sand grout for use with a geothermal heat pump system. The cement sand grout contains cement, silica sand, a superplasticizer, water and optionally bentonite. The present invention also includes a method of filling boreholes used for geothermal heat pump systems with the thermally conductive cement-sand grout. The cement-sand grout has improved thermal conductivity over neat cement and bentonite grouts, which allows shallower bore holes to be used to provide an equivalent heat transfer capacity. In addition, the cement-sand grouts of the present invention also provide improved bond strengths and decreased permeabilities. The cement-sand grouts can also contain blast furnace slag, fly ash, a thermoplastic air entraining agent, latex, a shrinkage reducing admixture, calcium oxide and combinations thereof.

Allan, Marita (Old Field, NY)

2001-01-01T23:59:59.000Z

434

A cost-effective and fuel-conserving nonelectric air conditioner that combines engine-driven compression and absorption cycles  

SciTech Connect

A natural-gas-fueled electricity-producing condensing furnace with the potential of being mass produced at a cost of less than $1000 and providing a cost-effective and highly fuel-conserving alternative to virtually every residential gas furnace in the world has been developed. While this is a new system, it completely consists of existing mass-produced components including single-cylinder air-cooled engines, induction motors/generators, and control devices. Thus, timely commercialization can be expected and an important new energy technology and industry can result. However, all the benefits of this electricity-producing furnace occur during the winter. This has stimulated the search for a new system that can provide comparable benefits in terms of fuel conservation, the environment, and electric utility peak reduction during the summer, along with the prospects of a new and efficient new use for the natural gas surpluses that occur during the summer. The resulting system, which can use existing component equipment, is a commercial-size nonelectric air conditioner that consists of an automobile-type engine converted to natural gas, or possibly a diesel or combustion turbine, driving a Freon compression cycle, with virtually all of the engine reject heat from the exhaust and from the engine cooling system driving a conventional absorption air conditioning cycle.

Wicks, F.

1988-01-01T23:59:59.000Z

435

The Impact of Forced Air System Blowers on Furnace Performance...  

NLE Websites -- All DOE Office Websites (Extended Search)

Canadian provinces and part owner of UNIES Ltd., an engineering firm in Winnipeg, Manitoba (60 miles straight north of the North DakotaMinnesota border). He does research and...

436

Simulation of air flow in the typical boiler windbox segments  

Science Conference Proceedings (OSTI)

Simulation of turbulent air flow distribution in CFBC furnace, wherein primary air is entrained through inlet duct system called windbox, is attempted through state of art CAD/CFD softwares. Establishment of flow in windbox channel, distributed plate ... Keywords: CFBC boiler, air flow, combustor geometry, distributed plate nozzles, multi-block grids, recirculation flow, simulation of flow, unequal air flow, windbox channel

C. Bhasker

2002-12-01T23:59:59.000Z

437

Preliminary Market Assessment for Cold Climate Heat Pumps  

SciTech Connect

Cold climate heat pump (HP) technology is relevant to a substantial portion of the U.S. population, especially with more than one-third of U.S. housing stock concentrated in colder regions of the country and another 31% in the mixed-humid climate region. Specifically, it is estimated that in 2010 almost 1.37 million heating equipment units were shipped to the cold/very cold climate regions and that 1.41 million were shipped to the nation s mixed-humid region. On a national level, the trend in the last decade has indicated that shipments of gas furnaces have grown at a slower rate than HPs. This indicates a potential opportunity for the cold climate HP, a technology that may be initially slow to penetrate its potential market because of the less expensive operating and first costs of gas furnaces. Anticipated implementation of regional standards could also negatively affect gas furnace shipments, especially with the higher initial cost for more efficient gas furnaces. However, as of 2011, the fact that there are more than 500 gas furnace product models that already achieve the expected efficiency standard indicates that satisfying the regional standard will be a challenge but not an obstacle. A look at the heating fuel and equipment currently being used in the housing stock provides an insight into the competing equipment that cold climate HPs hope to replace. The primary target market for the cold climate HP is the 2.6 million U.S. homes using electric furnaces and HPs in the cold/very cold region. It is estimated that 4.75% of these homeowners either replace or buy new heating equipment in a given year. Accordingly, the project team could infer that the cold climate HP primary market is composed of 123,500 replacements of electric furnaces and conventional air-to-air HPs annually. A secondary housing market for the cold climate HP comprises homes in the mixed-humid region of the country that are using electric furnaces. Homes using gas furnaces across both the cold/very cold and mixed-humid regions represent another secondary market for the cold climate HP. The cold climate HP could also target as a secondary market homes across both the cold/very cold and mixed-humid regions that use propane and fuel oil as their primary heating fuel. The combined total of homes in these three secondary markets is 46 million, and we can also infer that about 2.2 million of these systems are replaced annually. When comparing heating equipment stock in 2001, 2005, and 2009 in the cold/very cold region of the country, it appears that gas furnaces are slowly losing market share and that electric furnaces and HPs are making gains. The fact that electricity-dependent heating equipment is rising in preference among homeowners in the colder regions of the country shows that future penetration of the cold climate HP holds promise. Accordingly, cold climate HP technology could achieve an attractive position, given certain favorable market conditions such as reaching a competitive cost point, strong federal incentives, a consistent level of reliable performance, and a product rollout by a credible market leader. The project team relied on payback analysis to estimate the potential market penetration for the cold climate HP in each of its primary and secondary markets. In this analysis, we assumed a $250 price premium for the cold climate HP over the baseline HP. Electricity and gas prices and emissions were based on the 2010 Buildings Energy Data Book. The average heating load was calculated as 25.2 MMBTU per year in the cold/very cold and mixed-humid regions of the United States. Typical installed costs were obtained from the technical document supporting the U.S. Department of Energy rulemaking. The analysis showed that the cold climate HP will have a 2.2 year payback period when replacing an existing electric HP in the colder regions of the nation. The cold climate HP will have a 6 year payback period when replacing gas furnaces in the same climate regions. Accordingly, we estimated that the cold climate HP will have a penetration ratio rangin

Sikes, Karen [Sentech, Inc.; Khowailed, Gannate [Sentech, Inc.; Abdelaziz, Omar [ORNL

2011-09-01T23:59:59.000Z

438

Proposal for the award of a contract for the design, supply, installation and commissioning of a Heating, Ventilation and Air-Conditioning (HVAC) system for the computer room of the CERN Control Centre  

E-Print Network (OSTI)

Proposal for the award of a contract for the design, supply, installation and commissioning of a Heating, Ventilation and Air-Conditioning (HVAC) system for the computer room of the CERN Control Centre

2012-01-01T23:59:59.000Z

439

Proposal for the award of a contract for the design, supply, installation and commissioning of a Heating Ventilation and Air Conditioning (HVAC) system for the HIE-ISOLDE infrastructure  

E-Print Network (OSTI)

Proposal for the award of a contract for the design, supply, installation and commissioning of a Heating Ventilation and Air Conditioning (HVAC) system for the HIE-ISOLDE infrastructure

2012-01-01T23:59:59.000Z

440

Intermountain Gas Company (IGC) - Gas Heating Rebate Program | Department  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Intermountain Gas Company (IGC) - Gas Heating Rebate Program Intermountain Gas Company (IGC) - Gas Heating Rebate Program Intermountain Gas Company (IGC) - Gas Heating Rebate Program < Back Eligibility Residential Savings Category Heating & Cooling Commercial Heating & Cooling Heating Program Info State Idaho Program Type Utility Rebate Program Rebate Amount Furnace: $200/unit Provider Customer Service The Intermountain Gas Company's (IGC) Gas Heating Rebate Program offers customers a $200 per unit rebate when they convert to a high efficiency natural gas furnace that replaces a heating system using another energy source. New furnaces must meet a minimum AFUE efficiency rating of 90%, and the home must have been built at least three years prior to the furnace conversion to qualify for the rebate. Visit IGC's program web site for more

Note: This page contains sample records for the topic "furnaces heat air" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Tips: Natural Gas and Oil Heating Systems | Department of Energy  

NLE Websites -- All DOE Office Websites (Extended Search)

Natural Gas and Oil Heating Systems Tips: Natural Gas and Oil Heating Systems May 30, 2012 - 5:41pm Addthis Install a new energy-efficient furnace to save money over the long term....

442

Infrared Thermography applied to measurement of Heat transfer coefficient of water in a pipe heated by Joule effect  

E-Print Network (OSTI)

. Internal sources of heat are due to convection from flow of the heat transfer fluid through the pipes. Heat (material, diameter, spacing, and burial depth), (4) system flow rates, (5) heat transfer fluid properties · heat transfer fluid = 42% propylene glycol @ a flow rate of 350 gpm · heat pump model = Water Furnace

443

Measure Guideline: High Efficiency Natural Gas Furnaces  

SciTech Connect

This Measure Guideline covers installation of high-efficiency gas furnaces. Topics covered include when to install a high-efficiency gas furnace as a retrofit measure, how to identify and address risks, and the steps to be used in the selection and installation process. The guideline is written for Building America practitioners and HVAC contractors and installers. It includes a compilation of information provided by manufacturers, researchers, and the Department of Energy as well as recent research results from the Partnership for Advanced Residential Retrofit (PARR) Building America team.

Brand, L.; Rose, W.

2012-10-01T23:59:59.000Z

444

Segmented ceramic liner for induction furnaces  

DOE Patents (OSTI)

A non-fibrous ceramic liner for induction furnaces is provided by vertically stackable ring-shaped liner segments made of ceramic material in a light-weight cellular form. The liner segments can each be fabricated as a single unit or from a plurality of arcuate segments joined together by an interlocking mechanism. Also, the liner segments can be formed of a single ceramic material or can be constructed of multiple concentric layers with the layers being of different ceramic materials and/or cellular forms. Thermomechanically damaged liner segments are selectively replaceable in the furnace. 5 figs.

Gorin, A.H.; Holcombe, C.E.

1994-07-26T23:59:59.000Z

445

Building America Top Innovations 2013 Profile … High-Performance Furnace Blowers  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Annual Fuel Utilization Annual Fuel Utilization Efficiency [AFUE] and Seasonal Energy Efficiency Ratio [SEER] and at real installed conditions. A testing program was undertaken at two laboratories to compare the performance of furnace blowers over a range of static pressure differences that included standard rating points and measured field test pressures. Three different combinations of blowers and residential furnaces were tested. The laboratory test results for blower power and airflow were combined with DOE2 models of building loads, models of air conditioner performance, standby power, and igniter, and combustion air blower power to determine potential energy and peak demand impacts. BUILDING TECHNOLOGIES OFFICE Recognizing Top Innovations in Building Science - The U.S. Department of Energy's

446

Building America Top Innovations 2013 Profile … High-Performance Furnace Blowers  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

annual fuel utilization annual fuel utilization efficiency (AFUE) and seasonal energy efficiency ratio (SEER) and at real installed conditions. A testing program was undertaken at two laboratories to compare the performance of furnace blowers over a range of static pressure differences that included standard rating points and measured field test pressures. Three different combinations of blowers and residential furnaces were tested. The laboratory test results for blower power and airflow were combined with DOE2 models of building loads, models of air conditioner performance, standby power, and igniter and combustion air blower power to determine potential energy and peak demand impacts. BUILDING TECHNOLOGIES OFFICE Recognizing Top Innovations in Building Science - The U.S. Department of Energy's

447

Coal combustion under conditions of blast furnace injection. Technical report, March 1, 1994--May 31, 1994  

Science Conference Proceedings (OSTI)

A potentially new use for Illinois coal is its use as a fuel injected into a blast furnace to produce molten iron as the first step in steel production. Because of its increasing cost and decreasing availability, metallurgical coke is now being replaced by coal injected at the tuyere area of the furnace where the blast air enters. The purpose of this study is to evaluate the combustion of coal during the blast furnace injection process and to delineate the optimum properties of the feed coal. This investigation is significant to the use of Illinois coal in that the limited research to date suggests that coals of low fluidity and moderate to high sulfur and chlorine contents are suitable feedstocks for blast furnace injection. This proposal is a follow-up to one funded for the 1992-93 period. It is intended to complete the study already underway with the Armco Inc. Steel Company and to initiate a new cooperative study along somewhat similar lines with the Inland Steel Company. The results of this study will lead to the development of a testing and evaluation protocol that will give a unique and much needed understanding of the behavior of coal in the injection process and prove the potential of Illinois coals for such use. During this quarter samples of two feed coals and the IBCSP 112 (Herrin No. 6) were prepared for reactivity testing and compared to blast furnace coke, and char fines taken from an active blast furnace. As the initial part of a broad reactivity analysis program, these same samples were also analyzed on a thermogravimetric analyzer (TGA) to determine their combustion and reactivity properties.

Crelling, J.C. [Southern Illinois Univ., Carbondale, IL (United States)

1994-09-01T23:59:59.000Z

448

LONG TERM THERMAL STABILITY IN AIR OF IONIC LIQUID BASED ALTERNATIVE HEAT TRANSFER FLUIDS FOR CLEAN ENERGY PRODUCTION  

Science Conference Proceedings (OSTI)

The purpose of this study was to investigate the effect of long-term aging on the thermal stability and chemical structure of seven different ILs so as to explore their suitability for use as a heat transfer fluid. This was accomplished by heating the ILs for 15 weeks at 200°C in an oxidizing environment and performing subsequent analyses on the aged chemicals.

Fox, E.

2012-10-15T23:59:59.000Z

449

Long Term Thermal Stability In Air Of Ionic Liquid Based Alternative Heat Transfer Fluids For Clean Energy Production  

SciTech Connect

The purpose of this study was to investigate the effect of long-term aging on the thermal stability and chemical structure of seven different ILs so as to explore their suitability for use as a heat transfer fluid. This was accomplished by heating the ILs for 15 weeks at 200?C in an oxidizing environment and performing subsequent analyses on the aged chemicals.

2012-10-15T23:59:59.000Z

450

Modeling Energy Consumption of Residential Furnaces and Boilers...  

NLE Websites -- All DOE Office Websites (Extended Search)

Energy Consumption of Residential Furnaces and Boilers in U.S. homes Title Modeling Energy Consumption of Residential Furnaces and Boilers in U.S. homes Publication Type Report...

451

Furnace Blower Electricity: National and Regional Savings Potential  

E-Print Network (OSTI)

Ducts Total Electricity Consumption (kWh/year) ity ni x FrDucts Total Electricity Consumption (kWh/year) nt a ni x Fryear. Furnace blowers account for about 80% of the total furnace electricity consumption

Franco, Victor; Florida Solar Energy Center

2008-01-01T23:59:59.000Z

452

Grate Furnace Combustion: A Submodel for the Solid Fuel Layer  

Science Conference Proceedings (OSTI)

The reduction of NOx-formation in biomass fired grate furnaces requires the development of numerical models. To represent the variety in scales and physical processes playing a role in the conversion, newly developed ... Keywords: Grate furnace, biomass, reverse combustion

H. A. Kuijk; R. J. Bastiaans; J. A. Oijen; L. P. Goey

2007-05-01T23:59:59.000Z

453

Coal combustion under conditions of blast furnace injection. Technical report, 1 December 1992--28 February 1993  

SciTech Connect

A potentially new use for Illinois coal is its use as a fuel injected into a blast furnace to produce molten iron as the first step in steel production. Because of its increasing cost and decreasing availability, metallurgical coke is now being replaced by coal injected at the tuyere area of the furnace where the blast air enters. The purpose of this study is to evaluate the combustion of coal during the blast furnace injection process and to delineate the optimum properties of the feed coal. This investigation is significant to the use of Illinois coal in that the limited research to date suggests that coals of low fluidity and moderate to high sulfur and chlorine contents are suitable feedstocks for blast furnace injection. This proposed study is unique in that it will be the first North American effort to directly determine the nature of the combustion of coal injected into a blast furnace. The Amanda furnace of Armco is the only one in North America currently using coal injection and is, therefore, the only full scale testing facility available. During this quarter complete petrographic analyses of all of the samples so far collected were completed.

Crelling, J.C. [Southern Illinois Univ., Carbondale, IL (United States). Dept. of Geology; Case, E.R. [Armco, Inc., Middletown, OH (United States). Research and Technology Div.

1993-05-01T23:59:59.000Z

454

Furnace Efficiency – Energy and Throughput - Programmaster.org  

Science Conference Proceedings (OSTI)

About this Symposium. Meeting, 2011 TMS Annual Meeting & Exhibition. Symposium, Furnace Efficiency – Energy and Throughput. Sponsorship, The Minerals ...

455

Development of the household sample for furnace and boilerlife-cycle cost analysis  

Science Conference Proceedings (OSTI)

Residential household space heating energy use comprises close to half of all residential energy consumption. Currently, average space heating use by household is 43.9 Mbtu for a year. An average, however, does not reflect regional variation in heating practices, energy costs, or fuel type. Indeed, a national average does not capture regional or consumer group cost impacts from changing efficiency levels of heating equipment. The US Department of Energy sets energy standards for residential appliances in, what is called, a rulemaking process. The residential furnace and boiler efficiency rulemaking process investigates the costs and benefits of possible updates to the current minimum efficiency regulations. Lawrence Berkeley National Laboratory (LBNL) selected the sample used in the residential furnace and boiler efficiency rulemaking from publically available data representing United States residences. The sample represents 107 million households in the country. The data sample provides the household energy consumption and energy price inputs to the life-cycle cost analysis segment of the furnace and boiler rulemaking. This paper describes the choice of criteria to select the sample of houses used in the rulemaking process. The process of data extraction is detailed in the appendices and is easily duplicated. The life-cycle cost is calculated in two ways with a household marginal energy price and a national average energy price. The LCC results show that using an national average energy price produces higher LCC savings but does not reflect regional differences in energy price.

Whitehead, Camilla Dunham; Franco, Victor; Lekov, Alex; Lutz, Jim

2005-05-31T23:59:59.000Z

456

The information furnace: consolidated home control  

Science Conference Proceedings (OSTI)

?The Information Furnace is a basement-installed PC-type device that integrates existing consumer home-control, infotainment, security and communication technologies to transparently provide accessible and value-added services. A modern home contains ... Keywords: Automation, Consumer electronics, Home-control, Multi-modal interfaces

Diomidis D. Spinellis

2003-05-01T23:59:59.000Z

457

US Department of Energys Regulatory Negotiations Convening on Commercial Certification for Heating, Ventilating, Air-Conditioning, and Refrigeration Equipment  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

US Department of Energy's Regulatory Negotiations Convening on US Department of Energy's Regulatory Negotiations Convening on Commercial Certification for Heating, Ventilating, Air-Conditioning, and Refrigeration Equipment Public Information for Convening Interviews I. What are the substantive issues DOE seeks to address? Strategies for grouping various basic models for purposes of certification; Identification of non-efficiency attributes, which do not impact the measured consumption of the equipment as tested by DOE's test procedure; The information that is certified to the Department; The timing of when the certification should be made relative to distribution in commerce; and Alterations to a basic model that would impact the certification.

458

High-bandwidth continuous-flow arc furnace  

DOE Patents (OSTI)

A high-bandwidth continuous-flow arc furnace for stream welding applications includes a metal mass contained in a crucible having an orifice. A power source charges an electrode for generating an arc between the electrode and the mass. The arc heats the metal mass to a molten state. A pressurized gas source propels the molten metal mass through the crucible orifice in a continuous stream. As the metal is ejected, a metal feeder replenishes the molten metal bath. A control system regulates the electrode current, shielding gas pressure, and metal source to provide a continuous flow of molten metal at the crucible orifice. Independent control over the electrode current and shield gas pressure decouples the metal flow temperature and the molten metal flow rate, improving control over resultant weld characteristics. 4 figs.

Hardt, D.E.; Lee, S.G.

1996-08-06T23:59:59.000Z